{"title":"Engine \u0026 Under-Hood Harness","description":"","products":[{"product_id":"1998-grand-cherokee-4-0-engine-harness","title":"1998 Grand Cherokee 4.0 Engine Harness.","description":"\u003cp\u003eThis is ONLY for 1998 Jeep Grand Cherokee's with 4.0 Inline 6 Cylinder with Automatic 4x4. Harness will be fully inspected before shipped out, but you are purchasing a use product. \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eOnly difference between 4wd\/2wd dash light indicator so may not be a big deal to you, just fyi. \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"Default Title","offer_id":50054735593785,"sku":null,"price":200.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/IMG-5464.heic?v=1729278210"},{"product_id":"stand-alone-wiring-harness-cut-down-jeep-4-0-1991-1995-or-others","title":"Stand Alone Wiring Harness - Cut Down  - Jeep 4.0 - 1991-1995 Or Others?","description":"\u003cp\u003e - The Video Below explains why these are out of stock and I am not going to build anymore of these. If you have a harness to send me and you have watched the video of me explaining I don't have time to make these fool proof, I may consider cutting yours down to make it simplified, just not in a extremely fancy cut and labeled way. \u003cbr\u003e\u003cbr\u003e\u003ciframe width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/T8hFb9DnVpo\" title=\"How To Use My Harness - Never Building These Again - How To At Home For You\"\u003e\u003c\/iframe\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThese are the simplest basic wiring harness needed to run a Jeep 4.0. They are based off a 1991-1995 Jeep 4.0, but would run ANY 4.0 with the use of these year sensors. I will have a video below with instructions and details. I HIGHLY doubt I will ever build these again as I will explain in the video. I will possibly entertain the idea of you sending me a wiring harness for cut down, If I can leave it basic and simple for you to clean up and organize it to your liking. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eDO NOT BUY\u003c\/strong\u003e these if you are knowledgeable and have the experience with Jeeps and wiring to make these work. These were all plugged up and tested for function, but I do not have the time to be on the phone diagnosing if you can't get these to work. I will explain it better in the video, but that is why I decided to not continue to build these. Along with time it takes to build these versus what a basic engine harness sales for, it makes zero sense for me to do these. So these will be the only ones I probably ever build! \u003cbr\u003e\u003cbr\u003ePCM - ECU is NOT included. You will need a 1991-1994 or 1995 Jeep Cherokee, Grand Cherokee without security, Or Jeep Wrangler 4.0 Computer to run with this harness. 1991-1994 used a different style distributor than 1995's which strangely will run, just throws an engine code. These all have the 1993-1995 Crank Shaft sensor plugs. \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"Default Title","offer_id":51671120937273,"sku":null,"price":400.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/0FD15E8D-16A6-4130-93F0-0AB56E5C254F.jpg?v=1767892230"},{"product_id":"harness","title":"Engine Bay Wiring Harness - Fuse Box -  Jeep Cherokee XJ - 2000-2001 - NON ABS","description":"\u003cp\u003e\u003cstrong\u003ePLEASE READ VERY WELL BEFORE PURCHASING\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the Is the wiring harness that goes in the main engine bay with the fuse box and the gray main connector to the PCM. This harness also goes through the firewall to connect to the passenger side in cab Fuse Box and also on the driver side to the main connectors to the dash and body, Also the TCM.   \u003cstrong\u003e ***NON ABS***\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e - This was pulled from a 2001 Jeep Cherokee, I don't have systems to tell me which years interchange, but I am about positive these are only for 2000-2001 Jeep Cherokee XJs 4.0s. \u003cbr\u003e\u003cbr\u003e- This is NOT the \"engine wiring harness\" \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-cherokee-xj-2000-2001-four-02-sensors?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR IT\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e - If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE\u003c\/a\u003e to contact me. I\u003cstrong\u003e DO NOT\u003c\/strong\u003e do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part. A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with. \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"Default Title","offer_id":51710833590585,"sku":"56009742AG    - 105","price":350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/B82F8F34-A5F9-4B2C-BAFC-A73CD2F52394.jpg?v=1770398889"},{"product_id":"under-hood-to-in-cab-wiring-harness-jeep-cherokee-xj-1998-non-abs","title":"Under Hood TO In Cab Wiring Harness - Jeep Cherokee XJ - 1998 \u0026 1999 - NON ABS","description":"\u003cp\u003e\u003cstrong\u003ePLEASE READ VERY WELL BEFORE PURCHASING - WATCH VIDEO!! - DEX\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the Is the wiring harness that goes in the main engine bay with the fuse box and the gray main connector to the PCM. This harness also goes through the firewall to connect to the passenger side in cab Fuse Box and also on the driver side to the main connectors to the dash and body, Also the TCM.   \u003cstrong\u003e ***NON ABS***\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e- EDIT - The current one in stock is from a 1999- WATCH VIDEO the FIRST VIDEO for a better description! Last Video is previous sold harness. \u003cbr\u003e\u003cbr\u003e- These are pulled from a early 1998, March 1998. I don't have the systems to tell me exactly what years this would work on, so it is just sold as \"pulled from a 1998\" I personally don't think it would work in a 1997, but it should work in a 1999.\u003cbr\u003e\u003cbr\u003e- The \"Engine Harness\" 1997,1998,1999, are all different then 2000-2001 are the same basically.  \u003cbr\u003e\u003cbr\u003e- This is NOT the \"engine wiring harness\" \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-cherokee-xj-1998-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR IT\u003c\/a\u003e - I may need to fix that link - Dex 9-4-2026\u003cbr\u003e\u003cbr\u003e- If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE \u003c\/a\u003eto contact me. I do NOT do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part. A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with, So trying to avoid all this headache!\u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"Default Title","offer_id":51753667559737,"sku":"56009742AB     104","price":350.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/IMG-2076.heic?v=1791579921"},{"product_id":"engine-wiring-harness-jeep-cherokee-xj-2000-2001-four-02-sensors","title":"Engine Wiring Harness - Jeep Cherokee XJ - 2000-2001 - Four 02 Sensors","description":"\u003cp\u003e\u003cstrong\u003ePLEASE READ VERY WELL BEFORE PURCHASING\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the \"Engine Wiring Harness\" for a 2000-2001 Jeep Cherokee 4.0 Inline Six Cylinder Engine WITH Four Oxygen Sensors - Pre Catalytic Converters. This has the two main plugs into the PCM and goes to basically ALL the sensors on the engine. Also has the big main black plug around the transmission dipstick area that connects into the main body harness (click below for it) Make SURE you know what you are purchasing, Look pictures carefully!\u003cbr\u003e\u003cbr\u003e - This was pulled from a 2001 Jeep Cherokee, I don't have systems to tell me which years interchange, but I KNOW these are only for 2000-2001 Jeep Cherokee XJs 4.0s. \u003cbr\u003e\u003cbr\u003e- This is NOT the \"Fuse Box Under Hood Harness\" \u003ca href=\"https:\/\/www.dexjs.com\/products\/harness?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR IT\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e- If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE\u003c\/a\u003e to contact me. I\u003cstrong\u003e DO NOT\u003c\/strong\u003e do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part.\u003cbr\u003e\u003cbr\u003e -A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with causing me trouble and taking up time I don't have!!  \u003cbr\u003e\u003cbr\u003e - These come off wrecks or bad engines, so the vehicle was either driving when it wrecked or the jeep was running when the engine blew up. I check these very carefully!! \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"Default Title","offer_id":51754048717113,"sku":"56041502AB","price":350.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/521A97E2-89B0-4A8C-AA14-136FD9D6ECF3.jpg?v=1770399795"},{"product_id":"engine-wiring-harness-jeep-cherokee-xj-1998-only","title":"Engine Wiring Harness - Jeep Cherokee XJ - 4.0L - 1998 ONLY -","description":"\u003cp\u003e\u003cstrong\u003ePLEASE READ VERY WELL BEFORE PURCHASING\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the \"Engine Wiring Harness\" for a 1998 \u003cstrong\u003eONLY\u003c\/strong\u003e Jeep Cherokee 4.0 Inline Six Cylinder This has the two main plugs into the PCM and goes to basically ALL the sensors on the engine. Also has the big main black plug around the transmission dipstick area that connects into the main body harness (click below for it) Make SURE you know what you are purchasing, Look pictures carefully!\u003cbr\u003e\u003cbr\u003e - This was pulled from a 1998 Jeep Cherokee, I don't have systems to tell me which years interchange, but I KNOW these are only for 1998 Jeep Cherokee XJs 4.0s.  MAYYY work on a 1999, but don't hold me to that.  - Should Be From a 4x4, If not the only difference is the speed sensor pig tail needs about 7-9 inches of wire extension to reach the transfer case speed sensor. \u003cbr\u003e\u003cbr\u003e- This is NOT the \"Fuse Box Under Hood Harness\"  \u003ca href=\"https:\/\/www.dexjs.com\/products\/under-hood-to-in-cab-wiring-harness-jeep-cherokee-xj-1998-non-abs?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR IT\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e- If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE\u003c\/a\u003e to contact me. I\u003cstrong\u003e DO NOT\u003c\/strong\u003e do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part.\u003cbr\u003e\u003cbr\u003e -A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with causing me trouble and taking up time I don't have!!  \u003cbr\u003e\u003cbr\u003e - These come off wrecks or bad engines, so the vehicle was either driving when it wrecked or the jeep was running when the engine blew up. I check these very carefully!! \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"Default Title","offer_id":51754512089401,"sku":"56009776","price":350.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/IMG-3648.heic?v=1770307371"},{"product_id":"alternator-other-wiring-harness-jeep-cherokee-xj","title":"Alternator Wiring Harness - Starter Wiring - Jeep Cherokee XJ - NEEDS PICTURES","description":"\u003cp\u003e\u003cstrong\u003ePLEASE READ VERY WELL BEFORE PURCHASING\u003cbr\u003e\u003cbr\u003e- If you Have Not Noticed, This Listing is not 100% done. I am just busy elsewhere!! - Dex - 9-18-2026 \u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the \"Alternator Wiring Harness\" for a Jeep Cherokee 4.0 Inline Six Cylinder. This has a smaller rectangle connector, 8 \u0026amp; 4 Pin I think, It connects between the battery box are and goes to the Alternator, Small Starter wire, A\/C compressor \u0026amp; Pressure switch, Oil pressure sensor, and the Ignition Coil. Also has the main Positive \u0026amp; Grounds from the battery to block \u0026amp; starter. \u003cbr\u003e\u003cbr\u003e- These will usually need new battery terminal ends\u003cbr\u003e\u003cbr\u003e- I hope to get my years right, I am sitting in my Kitchen as I create the Year Models!! \u003cbr\u003e\u003cbr\u003e- 1996-1998 Use the Bolt on Alternator - 1999-2001 Use the Plug in Alternator\u003cbr\u003e\u003cbr\u003e- Need the Nuts for the 1991-1998 Alternator \u003ca href=\"https:\/\/www.dexjs.com\/products\/alternator-nuts-10mm-7mm-jeep-4-0-2-5-5-2?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e - 1999-2001 - Chrysler Part Number - 56009783 \u003cbr\u003e\u003cbr\u003e - 1997-1998 - \u003cbr\u003e\u003cbr\u003e - 1991-1996\u003cbr\u003e\u003cbr\u003e - 1987-1990\u003cbr\u003e\u003cbr\u003e- If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE\u003c\/a\u003e to contact me. I\u003cstrong\u003e DO NOT\u003c\/strong\u003e do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part.\u003cbr\u003e\u003cbr\u003e -A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with causing me trouble and taking up time I don't have!!  \u003cbr\u003e\u003cbr\u003e - These come off wrecks or bad engines, so the vehicle was either driving when it wrecked or the jeep was running when the engine blew up. I check these very carefully!! \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"1999-2001","offer_id":51756150817081,"sku":"ALT-9901     BOX C5","price":65.0,"currency_code":"USD","in_stock":true},{"title":"1997-1998","offer_id":51756150849849,"sku":"ALT-9798  BOX EE5","price":55.0,"currency_code":"USD","in_stock":true},{"title":"1991-1996","offer_id":51756150882617,"sku":"ALT-9196    BOX O4","price":70.0,"currency_code":"USD","in_stock":false},{"title":"1987-1990","offer_id":51756150915385,"sku":"ALT-8790   BOX O4","price":85.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/6F039442-771C-49FD-976E-D5DDC4BEBD0A.jpg?v=1789659301"},{"product_id":"engine-wiring-harness-jeep-cherokee-xj-4-0l-1999-only","title":"Engine Wiring Harness - Jeep Cherokee XJ - 4.0L - 1999 ONLY","description":"\u003cp\u003e\u003cstrong\u003ePLEASE READ VERY WELL BEFORE PURCHASING\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the \"Engine Wiring Harness\" for a 1999 \u003cstrong\u003eONLY\u003c\/strong\u003e Jeep Cherokee XJ 4.0 Inline Six Cylinder This has the two main plugs into the PCM and goes to basically ALL the sensors on the engine. Also has the big main black plug around the transmission dipstick area that connects into the main body harness (click below for it) Make SURE you know what you are purchasing, Look pictures carefully!\u003cbr\u003e\u003cbr\u003e - As rare as it is for me to come across these, I will try to include a video of each harness that is in stock at the moment. - 9-4-2026 - Dex\u003cbr\u003e\u003cbr\u003e- This is NOT the \"Fuse Box Under Hood Harness\"  \u003ca href=\"https:\/\/www.dexjs.com\/products\/under-hood-to-in-cab-wiring-harness-jeep-cherokee-xj-1998-non-abs?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR IT\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e- If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE\u003c\/a\u003e to contact me. I\u003cstrong\u003e DO NOT\u003c\/strong\u003e do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part.\u003cbr\u003e\u003cbr\u003e -A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with causing me trouble and taking up time I don't have!!  \u003cbr\u003e\u003cbr\u003e - These come off wrecks or bad engines, so the vehicle was either driving when it wrecked or the jeep was running when the engine blew up. I check these very carefully!! \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"Default Title","offer_id":52623636169017,"sku":"WHXJ9940-1      109","price":350.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/6725B560-75A2-4D10-82BD-2C3419AD1C19.jpg?v=1776957173"},{"product_id":"engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-1999-year-only","title":"1999 - Engine Wiring Harness - Jeep Grand Cherokee WJ - 4.0L - 1999 Year ONLY","description":"\u003cp\u003e\u003cstrong\u003ePLEASE READ VERY WELL BEFORE PURCHASING\u003cbr\u003e\u003cbr\u003e \u003cspan style=\"text-decoration: underline; color: rgb(255, 42, 0);\"\u003e-NOT FOR JEEP CHEROKEE XJ- \u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the \"Engine \u0026amp; Transmission Wiring Harness\" for a 1999 \u003cstrong\u003eONLY\u003c\/strong\u003e Jeep \u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eGRAND\u003c\/strong\u003e\u003c\/span\u003e Cherokee WJ 4.0 Inline Six Cylinder This has the two main plugs into the PCM and goes to basically ALL the sensors on the engine. Also has the big main black plug around the transmission dipstick area that connects into the main body harness (SOON- click below for it) Make SURE you know what you are purchasing, Look pictures carefully!\u003cbr\u003e\u003cbr\u003e - On 1999,2000,\u0026amp; 2001 Models, The wiring harness from both 2wd \u0026amp; 4wd ARE the same harness. They have an optional extension harness to plug into the main harness to go to the T-case shifter switch. I will sell the small extension harness separate (\u003ca href=\"https:\/\/www.dexjs.com\/products\/4wd-extension-harness-jeep-grand-cherokee-wj-4-0l-1999-2001?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR IT\u003c\/a\u003e) this way I can just sell a wiring harness as is and not have to keep up with 2wd and 4wd harness each. \u003cbr\u003e \u003cbr\u003e- The ONLY difference between a 2wd \u0026amp; 4wd harness on 2002-2004 is the the plug for the shift indicator for which 4wd selection the transfer case is in. They will interchange perfectly with no difference that affect running of the Jeep. So if you are needing a harness for either option, don't let a shift light hold you back from getting your Jeep running.   Most of what I get in are 2wd models! \u003cbr\u003e\u003cbr\u003e - These are pulled from a 1999 Jeep GRAND Cherokee with the 4.0 inline Six Cylinder Engines. They are typically pulled from wrecks or mechanically failed vehicles, so they should be in good useable conditions. \u003cbr\u003e\u003cbr\u003e - These are 20+ Year old USED Parts. I will not sell one if I am not confident that it is a completely usable part. If they have a broken or damaged plug I will include the needed parts to make sure you get what you are needing. \u003cbr\u003e\u003cbr\u003e- This is NOT the \"Fuse Box Under Hood Harness\"  CLICK HERE - COMING SOON\u003cbr\u003e\u003cbr\u003e- If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE\u003c\/a\u003e to contact me. I\u003cstrong\u003e DO NOT\u003c\/strong\u003e do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part.\u003cbr\u003e\u003cbr\u003e -A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with causing me trouble and taking up time I don't have!!  \u003cbr\u003e\u003cbr\u003e - These come off wrecks or bad engines, so the vehicle was either driving when it wrecked or the jeep was running when the engine blew up. I check these very carefully!! \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e - 1999 Years Only - These have the horizontal plug in for the coil pack instead of the 2000-2004 which have a vertical plug on the coil pack. 1999 transmission main plug is wired the same as 1993-1999 years where as 2000-2004 have a different pin out for overdrive.  I THINK 1999s only ever used upper and lower 02 Sensor with round style plugs, so no Pre-Cats were used (I will change if I run across any)  1999s used the 3 pin oil pressure sensor, 96-01 style TPS sensors.  Chrysler Part Number - 56042201\u003cbr\u003e\u003cbr\u003e - 2000-2001 Year models at the time of making this listing, I can't think of a difference in these harness but they do have different part number, so I can't say they are the same harness, but they had the \"california\" or \"standard\" emission models. Standard have no Pre-Cats and one upstream and one downstream 02 sensor with round style plugs along with just one large catalytic converter behind the crossmember. These will have the plug on the coil pack up and down, vertical. These have the 00-04 Pin out for the Transmissions. 2000-2001 used the 3 pin oil pressure sensor, 96-01 style TPS sensors.  - \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2000-2001-years?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2000\u003c\/a\u003e Chrysler Part Number - 56044400 or \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2001-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eHere For 2001\u003c\/a\u003e - Chrysler Part Number 56044769\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e- 2002 is a standalone year for a harness. These should all have the Pre Cats with the Four 02 sensors with the start year of the square wire connection plugs. These do not have 02 sensors close to the muffler area. These started with the newer TPS style plugs. They are still using the older 3 pin oil pressure sensor switch. \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2002-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2002\u003c\/a\u003e - Chrysler Part Number 56041989\u003cbr\u003e\u003cbr\u003e\u003cem\u003e- 2002-2003 - The ONLY difference that I am aware of between these years is 2002 uses the three pin\/ three wire oil pressure sensor where as the 2003 uses the one wire oil pressure sensor. If you are in a need for either, you could run either one and simply not have an oil pressure reading or install a manual gauge. My dads daily driver has an 02 harness on an 03 Jeep and just doesn't read oil pressure.\u003c\/em\u003e\u003cbr\u003e\u003cbr\u003e- 2003 is a standalone year harness. These should all have the Pre Cats with the Four 02 sensors. These do not have 02 sensors close to the muffler area. These use the newer square style wire connector plugs. These are basically the same as 2002s harness, they swapped to the single wire oil pressure sensors.  - \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2003-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2003\u003c\/a\u003e - Chrysler Part Number 56044369 - 2WD \u0026amp; 5604470 4wd\u003cbr\u003e\u003cbr\u003e - 2004 is a completely standoff year with only 2004 working for this year. The actual only difference from a 2003 is a 2004 model swapped to a new style MAP sensor. This COULD be re wired to either plug style you need but they are technically different harnesses. Some, but not all 2004s have the new updated style injector plug, but this is the same plug, just a different disconnect lever and lock. 1999-2004.5 older connectors were bad with the locks breaking. These use the new style Square Connector for the 02 Sensors. -\u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2004-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2004\u003c\/a\u003e - Chrysler Part Number 56050469 2WD \u0026amp; 5605047 4WD\u003cbr\u003e\u003cbr\u003e - All the information above should tell you the differences in the harnesses. I will try to list below what plugs never changed. I hope I don't miss any but this information comes from my brain so I could make a mistake.\u003cbr\u003e\u003cbr\u003e- Things that are all the same\u003cbr\u003e - Idle Air Control Valve - IAC\u003cbr\u003e - Air Temp Sensor\u003cbr\u003e - Injectors (aside from 2004 Update)\u003cbr\u003e - Coolant Temp Sensor\u003cbr\u003e - A\/C Clutch Plug\u003cbr\u003e - Coil Pack Plug Style -Aside From 1999 Orientation \u003cbr\u003e - Crankshaft Sensor Plug - CPS\u003cbr\u003e - Cam Sensor - Pick Up Coil\u003cbr\u003e - Computer Ground - Knock Sensor\u003cbr\u003e   Little One Wire Sensor by The Dipstick\u003cbr\u003e - Two PCM Plugs\u003cbr\u003e - Two Main Harness - Body Plugs\u003cbr\u003e - Park Neutral Switch \u003cbr\u003e - Main Transmission Valve Body Plug (1999 Pinout)\u003cbr\u003e - Tran Output Speed Sensor Plug \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"Fed Emissions - Two O2 Sensors","offer_id":54309276287289,"sku":"56042201 - 2-02      117","price":285.0,"currency_code":"USD","in_stock":true},{"title":"California Emissions - 4 O2 Sensors","offer_id":54309276320057,"sku":"56042201 - 4-02","price":295.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/8C33A018-0203-4ACA-8134-CC721F57F4CD.jpg?v=1786116387"},{"product_id":"engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2000-2001-years","title":"2000 - Engine Wiring Harness - Jeep Grand Cherokee WJ - 4.0L - 2000 Year ONLY","description":"\u003cp\u003e\u003cstrong\u003ePLEASE READ VERY WELL BEFORE PURCHASING\u003cbr\u003e\u003cbr\u003e \u003cspan style=\"text-decoration: underline; color: rgb(255, 42, 0);\"\u003e-NOT FOR JEEP CHEROKEE XJ- \u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the \"Engine \u0026amp; Transmission Wiring Harness\" for a 2000 Year Model \u003cstrong\u003eONLY\u003c\/strong\u003e Jeep \u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eGRAND\u003c\/strong\u003e\u003c\/span\u003e Cherokee WJ 4.0 Inline Six Cylinder This has the two main plugs into the PCM and goes to basically ALL the sensors on the engine. Also has the big main black plug around the transmission dipstick area that connects into the main body harness (SOON- click below for it) Make SURE you know what you are purchasing, Look pictures carefully!\u003cbr\u003e\u003cbr\u003e - On 1999,2000,\u0026amp; 2001 Models, The wiring harness from both 2wd \u0026amp; 4wd ARE the same harness. They have an optional extension harness to plug into the main harness to go to the T-case shifter switch. I will sell the small extension harness separate \u003ca href=\"https:\/\/www.dexjs.com\/products\/4wd-extension-harness-jeep-grand-cherokee-wj-4-0l-1999-2001?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003e(CLICK HERE FOR IT\u003c\/a\u003e) this way I can just sell a wiring harness as is and not have to keep up with 2wd and 4wd harness each. \u003cbr\u003e \u003cbr\u003e- The ONLY difference between a 2wd \u0026amp; 4wd harness on 2002-2004 is the the plug for the shift indicator for which 4wd selection the transfer case is in. They will interchange perfectly with no difference that affect running of the Jeep. So if you are needing a harness for either option, don't let a shift light hold you back from getting your Jeep running.   Most of what I get in are 2wd models! \u003cbr\u003e\u003cbr\u003e - These are pulled from a 2000 Jeep GRAND Cherokee with the 4.0 inline Six Cylinder Engines. They are typically pulled from wrecks or mechanically failed vehicles, so they should be in good useable conditions. \u003cbr\u003e\u003cbr\u003e - These are 20+ Year old USED Parts. I will not sell one if I am not confident that it is a completely usable part. If they have a broken or damaged plug I will include the needed parts to make sure you get what you are needing. \u003cbr\u003e\u003cbr\u003e- This is NOT the \"Fuse Box Under Hood Harness\"  CLICK HERE - SOON\u003cbr\u003e\u003cbr\u003e- If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE\u003c\/a\u003e to contact me. I\u003cstrong\u003e DO NOT\u003c\/strong\u003e do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part.\u003cbr\u003e\u003cbr\u003e -A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with causing me trouble and taking up time I don't have!!  \u003cbr\u003e\u003cbr\u003e - These come off wrecks or bad engines, so the vehicle was either driving when it wrecked or the jeep was running when the engine blew up. I check these very carefully!! \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e - 1999 Years Only - These have the horizontal plug in for the coil pack instead of the 2000-2004 which have a vertical plug on the coil pack. 1999 transmission main plug is wired the same as 1993-1999 years where as 2000-2004 have a different pin out for overdrive.  I THINK 1999s only ever used upper and lower 02 Sensor with round style plugs, so no Pre-Cats were used (I will change if I run across any)  1999s used the 3 pin oil pressure sensor, 96-01 style TPS sensors.  \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-1999-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 1999 Harness\u003c\/a\u003e  - Chrysler Part Number - 56042201\u003cbr\u003e\u003cbr\u003e - 2000-2001 Year models at the time of making this listing, I can't think of a difference in these harness but they do have different part number, so I can't say they same harness, but they had the \"california\" or \"standard\" emission models. Standard have no Pre-Cats and one upstream and one downstream 02 sensor with round style plugs along with just one large catalytic converter behind the crossmember. These will have the plug on the coil pack up and down, vertical. These have the 00-04 Pin out for the Transmissions. 2000-2001 used the 3 pin oil pressure sensor, 96-01 style TPS sensors.  2000-Chrysler Part Number - 56044400  - \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2001-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2001\u003c\/a\u003e - Chrysler Part Number 56044769\u003cbr\u003e\u003cbr\u003e - 2002 is a standalone year for a harness. These should all have the Pre Cats with the Four 02 sensors with the start year of the square wire connection plugs. These do not have 02 sensors close to the muffler area. These started with the newer TPS style plugs. They are still using the older 3 pin oil pressure sensor switch. \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2002-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2002\u003c\/a\u003e - Chrysler Part Number 56041989\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"text-decoration: underline;\"\u003e- 2002-2003 - The ONLY difference that I am aware of between these years is 2002 uses the three pin\/ three wire oil pressure sensor where as the 2003 uses the one wire oil pressure sensor. If you are in a need for either, you could run either one and simply not have an oil pressure reading or install a manual gauge. My dads daily driver has an 02 harness on an 03 Jeep and just doesn't read oil pressure.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e- 2003 is a standalone year harness. These should all have the Pre Cats with the Four 02 sensors. These do not have 02 sensors close to the muffler area. These use the newer square style wire connector plugs. These are basically the same as 2002s harness, they swapped to the single wire oil pressure sensors.  - \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2003-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2003\u003c\/a\u003e - Chrysler Part Number 56044369 - 2WD \u0026amp; 5604470 4wd\u003cbr\u003e\u003cbr\u003e - 2004 is a completely standoff year with only 2004 working for this year. The actual only difference from a 2003 is a 2004 model swapped to a new style MAP sensor. This COULD be re wired to either plug style you need but they are technically different harnesses. Some, but not all 2004s have the new updated style injector plug, but this is the same plug, just a different disconnect lever and lock. 1999-2004.5 older connectors were bad with the locks breaking. These use the new style Square Connector for the 02 Sensors. -\u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2004-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2004\u003c\/a\u003e - Chrysler Part Number 56050469 2WD \u0026amp; 5605047 4WD\u003cbr\u003e\u003cbr\u003e - All the information above should tell you the differences in the harnesses. I will try to list below what plugs never changed. I hope I don't miss any but this information comes from my brain so I could make a mistake.\u003cbr\u003e\u003cbr\u003e- Things that are all the same\u003cbr\u003e - Idle Air Control Valve - IAC\u003cbr\u003e - Air Temp Sensor\u003cbr\u003e - Injectors (aside from 2004 Update)\u003cbr\u003e - Coolant Temp Sensor\u003cbr\u003e - A\/C Clutch Plug\u003cbr\u003e - Coil Pack Plug Style -Aside From 1999 Orientation \u003cbr\u003e - Crankshaft Sensor Plug - CPS\u003cbr\u003e - Cam Sensor - Pick Up Coil\u003cbr\u003e - Computer Ground - Knock Sensor\u003cbr\u003e   Little One Wire Sensor by The Dipstick\u003cbr\u003e - Two PCM Plugs\u003cbr\u003e - Two Main Harness - Body Plugs\u003cbr\u003e - Park Neutral Switch \u003cbr\u003e - Main Transmission Valve Body Plug (1999 Pinout)\u003cbr\u003e - Tran Output Speed Sensor Plug \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"Fed Emissions - Two O2 Sensors - 56044400","offer_id":54314065461561,"sku":"56044400 - 2-02      113","price":282.0,"currency_code":"USD","in_stock":true},{"title":"California Emissions - 4 O2 Sensors - 56044402","offer_id":54314065494329,"sku":"560444002 - 4-02     113","price":322.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/DBA72D53-765C-4F24-AB6C-4040248687FB.jpg?v=1786118934"},{"product_id":"engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2002-year-only","title":"2002 - Engine Wiring Harness - Jeep Grand Cherokee WJ - 4.0L - 2002  Year ONLY","description":"\u003cp\u003e\u003cstrong\u003ePLEASE READ VERY WELL BEFORE PURCHASING\u003cbr\u003e\u003cbr\u003e \u003cspan style=\"text-decoration: underline; color: rgb(255, 42, 0);\"\u003e-NOT FOR JEEP CHEROKEE XJ- \u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e- HAVE NOT PULLED A 2002 Harness YET - 8-7-2026 - Dex\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the \"Engine \u0026amp; Transmission Wiring Harness\" for a 2002 Year Model \u003cstrong\u003eONLY\u003c\/strong\u003e Jeep \u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eGRAND\u003c\/strong\u003e\u003c\/span\u003e Cherokee WJ 4.0 Inline Six Cylinder This has the two main plugs into the PCM and goes to basically ALL the sensors on the engine. Also has the big main black plug around the transmission dipstick area that connects into the main body harness (SOON- click below for it) Make SURE you know what you are purchasing, Look pictures carefully!\u003cbr\u003e\u003cbr\u003e - On 1999,2000,\u0026amp; 2001 Models, The wiring harness from both 2wd \u0026amp; 4wd ARE the same harness. They have an optional extension harness to plug into the main harness to go to the T-case shifter switch. I will sell the small extension harness separate (CLICK HERE FOR IT) this way I can just sell a wiring harness as is and not have to keep up with 2wd and 4wd harness each. \u003cbr\u003e \u003cbr\u003e- The ONLY difference between a 2wd \u0026amp; 4wd harness on 2002-2004 is the the plug for the shift indicator for which 4wd selection the transfer case is in. They will interchange perfectly with no difference that affect running of the Jeep. So if you are needing a harness for either option, don't let a shift light hold you back from getting your Jeep running.   Most of what I get in are 2wd models! \u003cbr\u003e\u003cbr\u003e - These are pulled from a 2002 Jeep GRAND Cherokee with the 4.0 inline Six Cylinder Engines. They are typically pulled from wrecks or mechanically failed vehicles, so they should be in good useable conditions. \u003cbr\u003e\u003cbr\u003e - These are 20+ Year old USED Parts. I will not sell one if I am not confident that it is a completely usable part. If they have a broken or damaged plug I will include the needed parts to make sure you get what you are needing. \u003cbr\u003e\u003cbr\u003e- This is NOT the \"Fuse Box Under Hood Harness\"  CLICK HERE - SOON\u003cbr\u003e\u003cbr\u003e- If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE\u003c\/a\u003e to contact me. I\u003cstrong\u003e DO NOT\u003c\/strong\u003e do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part.\u003cbr\u003e\u003cbr\u003e -A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with causing me trouble and taking up time I don't have!!  \u003cbr\u003e\u003cbr\u003e - These come off wrecks or bad engines, so the vehicle was either driving when it wrecked or the jeep was running when the engine blew up. I check these very carefully!! \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e - 1999 Years Only - These have the horizontal plug in for the coil pack instead of the 2000-2004 which have a vertical plug on the coil pack. 1999 transmission main plug is wired the same as 1993-1999 years where as 2000-2004 have a different pin out for overdrive.  I THINK 1999s only ever used upper and lower 02 Sensor with round style plugs, so no Pre-Cats were used (I will change if I run across any)  1999s used the 3 pin oil pressure sensor, 96-01 style TPS sensors. \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-1999-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 1999 Harness\u003c\/a\u003e - Chrysler Part Number - 56042201\u003cbr\u003e\u003cbr\u003e - 2000-2001 Year models at the time of making this listing, I can't think of a difference in these harness but they do have different part number, so I can't say they are the same harness, but they had the \"california\" or \"standard\" emission models. Standard have no Pre-Cats and one upstream and one downstream 02 sensor with round style plugs along with just one large catalytic converter behind the crossmember. These will have the plug on the coil pack up and down, vertical. These have the 00-04 Pin out for the Transmissions. 2000-2001 used the 3 pin oil pressure sensor, 96-01 style TPS sensors.  - \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2000-2001-years?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2000\u003c\/a\u003e - Chrysler Part Number - 56044400   or \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2001-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eHERE For 2001\u003c\/a\u003e- Chrysler Part Number 56044769\u003cbr\u003e\u003cbr\u003e - 2002 is a standalone year for a harness. These should all have the Pre Cats with the Four 02 sensors with the start year of the square wire connection plugs. These do not have 02 sensors close to the muffler area. These started with the newer TPS style plugs. They are still using the older 3 pin oil pressure sensor switch.  2002 - Chrysler Part Number 56041989\u003cbr\u003e\u003cbr\u003e\u003cem\u003e- 2002-2003 - The ONLY difference that I am aware of between these years is 2002 uses the three pin\/ three wire oil pressure sensor where as the 2003 uses the one wire oil pressure sensor. If you are in a need for either, you could run either one and simply not have an oil pressure reading or install a manual gauge. My dads daily driver has an 02 harness on an 03 Jeep and just doesn't read oil pressure.\u003c\/em\u003e\u003cbr\u003e\u003cbr\u003e- 2003 is a standalone year harness. These should all have the Pre Cats with the Four 02 sensors. These do not have 02 sensors close to the muffler area. These use the newer square style wire connector plugs. These are basically the same as 2002s harness, they swapped to the single wire oil pressure sensors.  - \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2003-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2003\u003c\/a\u003e - Chrysler Part Number 56044369 - 2WD \u0026amp; 5604470 4wd\u003cbr\u003e\u003cbr\u003e - 2004 is a completely standoff year with only 2004 working for this year. The actual only difference from a 2003 is a 2004 model swapped to a new style MAP sensor. This COULD be re wired to either plug style you need but they are technically different harnesses. Some, but not all 2004s have the new updated style injector plug, but this is the same plug, just a different disconnect lever and lock. 1999-2004.5 older connectors were bad with the locks breaking. These use the new style Square Connector for the 02 Sensors. -\u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2004-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2004\u003c\/a\u003e - Chrysler Part Number 56050469 2WD \u0026amp; 5605047 4WD\u003cbr\u003e\u003cbr\u003e - All the information above should tell you the differences in the harnesses. I will try to list below what plugs never changed. I hope I don't miss any but this information comes from my brain so I could make a mistake.\u003cbr\u003e\u003cbr\u003e- Things that are all the same\u003cbr\u003e - Idle Air Control Valve - IAC\u003cbr\u003e - Air Temp Sensor\u003cbr\u003e - Injectors (aside from 2004 Update)\u003cbr\u003e - Coolant Temp Sensor\u003cbr\u003e - A\/C Clutch Plug\u003cbr\u003e - Coil Pack Plug Style -Aside From 1999 Orientation \u003cbr\u003e - Crankshaft Sensor Plug - CPS\u003cbr\u003e - Cam Sensor - Pick Up Coil\u003cbr\u003e - Computer Ground - Knock Sensor\u003cbr\u003e   Little One Wire Sensor by The Dipstick\u003cbr\u003e - Two PCM Plugs\u003cbr\u003e - Two Main Harness - Body Plugs\u003cbr\u003e - Park Neutral Switch \u003cbr\u003e - Main Transmission Valve Body Plug (1999 Pinout)\u003cbr\u003e - Tran Output Speed Sensor Plug \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"Default Title","offer_id":54309177491769,"sku":"56041989","price":250.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/IMG-0975.heic?v=1786119953"},{"product_id":"engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2003-year-only","title":"2003 - Engine Wiring Harness - Jeep Grand Cherokee WJ - 4.0L - 2003  Year ONLY","description":"\u003cp\u003e\u003cstrong\u003ePLEASE READ VERY WELL BEFORE PURCHASING\u003cbr\u003e\u003cbr\u003e \u003cspan style=\"text-decoration: underline; color: rgb(255, 42, 0);\"\u003e-NOT FOR JEEP CHEROKEE XJ- \u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the \"Engine \u0026amp; Transmission Wiring Harness\" for a 2003 Year Model \u003cstrong\u003eONLY\u003c\/strong\u003e Jeep \u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eGRAND\u003c\/strong\u003e\u003c\/span\u003e Cherokee WJ 4.0 Inline Six Cylinder This has the two main plugs into the PCM and goes to basically ALL the sensors on the engine. Also has the big main black plug around the transmission dipstick area that connects into the main body harness (SOON- click below for it) Make SURE you know what you are purchasing, Look pictures carefully!\u003cbr\u003e\u003cbr\u003e - On 1999,2000,\u0026amp; 2001 Models, The wiring harness from both 2wd \u0026amp; 4wd ARE the same harness. They have an optional extension harness to plug into the main harness to go to the T-case shifter switch. I will sell the small extension harness separate (CLICK HERE FOR IT) this way I can just sell a wiring harness as is and not have to keep up with 2wd and 4wd harness each. \u003cbr\u003e \u003cbr\u003e- The ONLY difference between a 2wd \u0026amp; 4wd harness on 2002-2004 is the the plug for the shift indicator for which 4wd selection the transfer case is in. They will interchange perfectly with no difference that affect running of the Jeep. So if you are needing a harness for either option, don't let a shift light hold you back from getting your Jeep running.   Most of what I get in are 2wd models! \u003cbr\u003e\u003cbr\u003e - These are pulled from a 2003 Jeep GRAND Cherokee with the 4.0 inline Six Cylinder Engines. They are typically pulled from wrecks or mechanically failed vehicles, so they should be in good useable conditions. \u003cbr\u003e\u003cbr\u003e - These are 20+ Year old USED Parts. I will not sell one if I am not confident that it is a completely usable part. If they have a broken or damaged plug I will include the needed parts to make sure you get what you are needing. \u003cbr\u003e\u003cbr\u003e- This is NOT the \"Fuse Box Under Hood Harness\"  CLICK HERE - SOON\u003cbr\u003e\u003cbr\u003e- If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE\u003c\/a\u003e to contact me. I\u003cstrong\u003e DO NOT\u003c\/strong\u003e do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part.\u003cbr\u003e\u003cbr\u003e -A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with causing me trouble and taking up time I don't have!!  \u003cbr\u003e\u003cbr\u003e - These come off wrecks or bad engines, so the vehicle was either driving when it wrecked or the jeep was running when the engine blew up. I check these very carefully!! \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e - 1999 Years Only - These have the horizontal plug in for the coil pack instead of the 2000-2004 which have a vertical plug on the coil pack. 1999 transmission main plug is wired the same as 1993-1999 years where as 2000-2004 have a different pin out for overdrive.  I THINK 1999s only ever used upper and lower 02 Sensor with round style plugs, so no Pre-Cats were used (I will change if I run across any)  1999s used the 3 pin oil pressure sensor, 96-01 style TPS sensors.  \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-1999-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 1999 Harness\u003c\/a\u003e - Chrysler Part Number - 56042201\u003cbr\u003e\u003cbr\u003e - 2000-2001 Year models at the time of making this listing, I can't think of a difference in these harness but they do have different part number, so I can't say they are the same harness, but they had the \"california\" or \"standard\" emission models. Standard have no Pre-Cats and one upstream and one downstream 02 sensor with round style plugs along with just one large catalytic converter behind the crossmember. These will have the plug on the coil pack up and down, vertical. These have the 00-04 Pin out for the Transmissions. 2000-2001 used the 3 pin oil pressure sensor, 96-01 style TPS sensors.  - \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2000-2001-years?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2000\u003c\/a\u003e - Chrysler Part Number - 56044400   or \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2001-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eHere For 2001\u003c\/a\u003e- Chrysler Part Number 56044769\u003cbr\u003e\u003cbr\u003e - 2002 is a standalone year for a harness. These should all have the Pre Cats with the Four 02 sensors with the start year of the square wire connection plugs. These do not have 02 sensors close to the muffler area. These started with the newer TPS style plugs. They are still using the older 3 pin oil pressure sensor switch. \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2002-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2002\u003c\/a\u003e - Chrysler Part Number 56041989\u003cbr\u003e\u003cbr\u003e\u003cem\u003e- 2002-2003 - The ONLY difference that I am aware of between these years is 2002 uses the three pin\/ three wire oil pressure sensor where as the 2003 uses the one wire oil pressure sensor. If you are in a need for either, you could run either one and simply not have an oil pressure reading or install a manual gauge. My dads daily driver has an 02 harness on an 03 Jeep and just doesn't read oil pressure.\u003c\/em\u003e\u003cbr\u003e\u003cbr\u003e- 2003 is a standalone year harness. These should all have the Pre Cats with the Four 02 sensors. These do not have 02 sensors close to the muffler area. These use the newer square style wire connector plugs. These are basically the same as 2002s harness, they swapped to the single wire oil pressure sensors.  - 2003 - Chrysler Part Number 56044369 - 2WD \u0026amp; 5604470 4wd\u003cbr\u003e\u003cbr\u003e - 2004 is a completely standoff year with only 2004 working for this year. The actual only difference from a 2003 is a 2004 model swapped to a new style MAP sensor. This COULD be re wired to either plug style you need but they are technically different harnesses. Some, but not all 2004s have the new updated style injector plug, but this is the same plug, just a different disconnect lever and lock. 1999-2004.5 older connectors were bad with the locks breaking. These use the new style Square Connector for the 02 Sensors. -\u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2004-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2004\u003c\/a\u003e - Chrysler Part Number 56050469 2WD \u0026amp; 5605047 4WD\u003cbr\u003e\u003cbr\u003e - All the information above should tell you the differences in the harnesses. I will try to list below what plugs never changed. I hope I don't miss any but this information comes from my brain so I could make a mistake.\u003cbr\u003e\u003cbr\u003e- Things that are all the same\u003cbr\u003e - Idle Air Control Valve - IAC\u003cbr\u003e - Air Temp Sensor\u003cbr\u003e - Injectors (aside from 2004 Update)\u003cbr\u003e - Coolant Temp Sensor\u003cbr\u003e - A\/C Clutch Plug\u003cbr\u003e - Coil Pack Plug Style -Aside From 1999 Orientation \u003cbr\u003e - Crankshaft Sensor Plug - CPS\u003cbr\u003e - Cam Sensor - Pick Up Coil\u003cbr\u003e - Computer Ground - Knock Sensor\u003cbr\u003e   Little One Wire Sensor by The Dipstick\u003cbr\u003e - Two PCM Plugs\u003cbr\u003e - Two Main Harness - Body Plugs\u003cbr\u003e - Park Neutral Switch \u003cbr\u003e - Main Transmission Valve Body Plug (1999 Pinout)\u003cbr\u003e - Tran Output Speed Sensor Plug \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"2wd - 56044369","offer_id":54314079519033,"sku":"56044369       117","price":292.0,"currency_code":"USD","in_stock":true},{"title":"4wd - 56044370","offer_id":54314079551801,"sku":"56044370   114","price":344.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/D2D188DD-EDFE-4B97-AC89-5DC1674D9BB8.jpg?v=1786127432"},{"product_id":"engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2004-year-only","title":"2004 - Engine Wiring Harness - Jeep Grand Cherokee WJ - 4.0L - 2004  Year ONLY","description":"\u003cp\u003e\u003cstrong\u003ePLEASE READ VERY WELL BEFORE PURCHASING\u003cbr\u003e\u003cbr\u003e \u003cspan style=\"text-decoration: underline; color: rgb(255, 42, 0);\"\u003e-NOT FOR JEEP CHEROKEE XJ- \u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the \"Engine \u0026amp; Transmission Wiring Harness\" for a 2004 Year Model \u003cstrong\u003eONLY\u003c\/strong\u003e Jeep \u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eGRAND\u003c\/strong\u003e\u003c\/span\u003e Cherokee WJ 4.0 Inline Six Cylinder This has the two main plugs into the PCM and goes to basically ALL the sensors on the engine. Also has the big main black plug around the transmission dipstick area that connects into the main body harness (SOON- click below for it) Make SURE you know what you are purchasing, Look pictures carefully!\u003cbr\u003e\u003cbr\u003e - On 1999,2000,\u0026amp; 2001 Models, The wiring harness from both 2wd \u0026amp; 4wd ARE the same harness. They have an optional extension harness to plug into the main harness to go to the T-case shifter switch. I will sell the small extension harness separate (CLICK HERE FOR IT) this way I can just sell a wiring harness as is and not have to keep up with 2wd and 4wd harness each. \u003cbr\u003e \u003cbr\u003e- The ONLY difference between a 2wd \u0026amp; 4wd harness on 2002-2004 is the the plug for the shift indicator for which 4wd selection the transfer case is in. They will interchange perfectly with no difference that affect running of the Jeep. So if you are needing a harness for either option, don't let a shift light hold you back from getting your Jeep running.   Most of what I get in are 2wd models! \u003cbr\u003e\u003cbr\u003e - These are pulled from a 1999 Jeep GRAND Cherokee with the 4.0 inline Six Cylinder Engines. They are typically pulled from wrecks or mechanically failed vehicles, so they should be in good useable conditions. \u003cbr\u003e\u003cbr\u003e - These are 20+ Year old USED Parts. I will not sell one if I am not confident that it is a completely usable part. If they have a broken or damaged plug I will include the needed parts to make sure you get what you are needing. \u003cbr\u003e\u003cbr\u003e- This is NOT the \"Fuse Box Under Hood Harness\"  CLICK HERE - SOON\u003cbr\u003e\u003cbr\u003e- If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE\u003c\/a\u003e to contact me. I\u003cstrong\u003e DO NOT\u003c\/strong\u003e do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part.\u003cbr\u003e\u003cbr\u003e -A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with causing me trouble and taking up time I don't have!!  \u003cbr\u003e\u003cbr\u003e - These come off wrecks or bad engines, so the vehicle was either driving when it wrecked or the jeep was running when the engine blew up. I check these very carefully!! \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e - 1999 Years Only - These have the horizontal plug in for the coil pack instead of the 2000-2004 which have a vertical plug on the coil pack. 1999 transmission main plug is wired the same as 1993-1999 years where as 2000-2004 have a different pin out for overdrive.  I THINK 1999s only ever used upper and lower 02 Sensor with round style plugs, so no Pre-Cats were used (I will change if I run across any)  1999s used the 3 pin oil pressure sensor, 96-01 style TPS sensors.  \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-1999-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 1999 Harness\u003c\/a\u003e - Chrysler Part Number - 56042201\u003cbr\u003e\u003cbr\u003e - 2000-2001 Year models at the time of making this listing, I can't think of a difference in these harness but they do have different part number, so I can't say they are the same harness, but they had the \"california\" or \"standard\" emission models. Standard have no Pre-Cats and one upstream and one downstream 02 sensor with round style plugs along with just one large catalytic converter behind the crossmember. These will have the plug on the coil pack up and down, vertical. These have the 00-04 Pin out for the Transmissions. 2000-2001 used the 3 pin oil pressure sensor, 96-01 style TPS sensors.  - \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2000-2001-years?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2000\u003c\/a\u003e - Chrysler Part Number - 56044400   or \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2001-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eHERE For 2001\u003c\/a\u003e- Chrysler Part Number 56044769\u003cbr\u003e\u003cbr\u003e - 2002 is a standalone year for a harness. These should all have the Pre Cats with the Four 02 sensors with the start year of the square wire connection plugs. These do not have 02 sensors close to the muffler area. These started with the newer TPS style plugs. They are still using the older 3 pin oil pressure sensor switch. \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2002-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2002\u003c\/a\u003e - Chrysler Part Number 56041989\u003cbr\u003e\u003cbr\u003e\u003cem\u003e- 2002-2003 - The ONLY difference that I am aware of between these years is 2002 uses the three pin\/ three wire oil pressure sensor where as the 2003 uses the one wire oil pressure sensor. If you are in a need for either, you could run either one and simply not have an oil pressure reading or install a manual gauge. My dads daily driver has an 02 harness on an 03 Jeep and just doesn't read oil pressure.\u003c\/em\u003e\u003cbr\u003e\u003cbr\u003e- 2003 is a standalone year harness. These should all have the Pre Cats with the Four 02 sensors. These do not have 02 sensors close to the muffler area. These use the newer square style wire connector plugs. These are basically the same as 2002s harness, they swapped to the single wire oil pressure sensors.  - \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2003-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2003\u003c\/a\u003e - Chrysler Part Number 56044369 - 2WD \u0026amp; 5604470 4wd\u003cbr\u003e\u003cbr\u003e - 2004 is a completely standoff year with only 2004 working for this year. The actual only difference from a 2003 is a 2004 model swapped to a new style MAP sensor. This COULD be re wired to either plug style you need but they are technically different harnesses. Some, but not all 2004s have the new updated style injector plug, but this is the same plug, just a different disconnect lever and lock. 1999-2004.5 older connectors were bad with the locks breaking. These use the new style Square Connector for the 02 Sensors. - 2004 - Chrysler Part Number 56050469 2WD \u0026amp; 5605047 4WD\u003cbr\u003e\u003cbr\u003e - All the information above should tell you the differences in the harnesses. I will try to list below what plugs never changed. I hope I don't miss any but this information comes from my brain so I could make a mistake.\u003cbr\u003e\u003cbr\u003e- Things that are all the same\u003cbr\u003e - Idle Air Control Valve - IAC\u003cbr\u003e - Air Temp Sensor\u003cbr\u003e - Injectors (aside from 2004 Update)\u003cbr\u003e - Coolant Temp Sensor\u003cbr\u003e - A\/C Clutch Plug\u003cbr\u003e - Coil Pack Plug Style -Aside From 1999 Orientation \u003cbr\u003e - Crankshaft Sensor Plug - CPS\u003cbr\u003e - Cam Sensor - Pick Up Coil\u003cbr\u003e - Computer Ground - Knock Sensor\u003cbr\u003e   Little One Wire Sensor by The Dipstick\u003cbr\u003e - Two PCM Plugs\u003cbr\u003e - Two Main Harness - Body Plugs\u003cbr\u003e - Park Neutral Switch \u003cbr\u003e - Main Transmission Valve Body Plug (1999 Pinout)\u003cbr\u003e - Tran Output Speed Sensor Plug \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"2 Wheel Drive - 56050469","offer_id":54314270720313,"sku":"56050469    113","price":305.0,"currency_code":"USD","in_stock":true},{"title":"4 Wheel Drive - 56050470","offer_id":54314270753081,"sku":"56050470   113","price":354.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/9699B35E-5A6F-432A-A1A5-FCE0D2BF8BB5.jpg?v=1786128642"},{"product_id":"engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2001-year-only","title":"2001 - Engine Wiring Harness - Jeep Grand Cherokee WJ - 4.0L - 2001 Year ONLY","description":"\u003cp\u003e\u003cstrong\u003ePLEASE READ VERY WELL BEFORE PURCHASING\u003cbr\u003e\u003cbr\u003e \u003cspan style=\"text-decoration: underline; color: rgb(255, 42, 0);\"\u003e-NOT FOR JEEP CHEROKEE XJ- \u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e- HAVE NOT PULLED A 2001 Harness YET - 8-7-2026 - Dex\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the \"Engine \u0026amp; Transmission Wiring Harness\" for a 2001 Year Model \u003cstrong\u003eONLY\u003c\/strong\u003e Jeep \u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eGRAND\u003c\/strong\u003e\u003c\/span\u003e Cherokee WJ 4.0 Inline Six Cylinder This has the two main plugs into the PCM and goes to basically ALL the sensors on the engine. Also has the big main black plug around the transmission dipstick area that connects into the main body harness (SOON- click below for it) Make SURE you know what you are purchasing, Look pictures carefully!\u003cbr\u003e\u003cbr\u003e - On 1999,2000,\u0026amp; 2001 Models, The wiring harness from both 2wd \u0026amp; 4wd ARE the same harness. They have an optional extension harness to plug into the main harness to go to the T-case shifter switch. I will sell the small extension harness separate (\u003ca href=\"https:\/\/www.dexjs.com\/products\/4wd-extension-harness-jeep-grand-cherokee-wj-4-0l-1999-2001?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR IT\u003c\/a\u003e) this way I can just sell a wiring harness as is and not have to keep up with 2wd and 4wd harness each. \u003cbr\u003e \u003cbr\u003e- The ONLY difference between a 2wd \u0026amp; 4wd harness on 2002-2004 is the the plug for the shift indicator for which 4wd selection the transfer case is in. They will interchange perfectly with no difference that affect running of the Jeep. So if you are needing a harness for either option, don't let a shift light hold you back from getting your Jeep running.   Most of what I get in are 2wd models! \u003cbr\u003e\u003cbr\u003e - These are pulled from a 2001 Jeep GRAND Cherokee with the 4.0 inline Six Cylinder Engines. They are typically pulled from wrecks or mechanically failed vehicles, so they should be in good useable conditions. \u003cbr\u003e\u003cbr\u003e - These are 20+ Year old USED Parts. I will not sell one if I am not confident that it is a completely usable part. If they have a broken or damaged plug I will include the needed parts to make sure you get what you are needing. \u003cbr\u003e\u003cbr\u003e- This is NOT the \"Fuse Box Under Hood Harness\"  CLICK HERE - SOON\u003cbr\u003e\u003cbr\u003e- If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE\u003c\/a\u003e to contact me. I\u003cstrong\u003e DO NOT\u003c\/strong\u003e do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part.\u003cbr\u003e\u003cbr\u003e -A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with causing me trouble and taking up time I don't have!!  \u003cbr\u003e\u003cbr\u003e - These come off wrecks or bad engines, so the vehicle was either driving when it wrecked or the jeep was running when the engine blew up. I check these very carefully!! \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e - 1999 Years Only - These have the horizontal plug in for the coil pack instead of the 2000-2004 which have a vertical plug on the coil pack. 1999 transmission main plug is wired the same as 1993-1999 years where as 2000-2004 have a different pin out for overdrive.  I THINK 1999s only ever used upper and lower 02 Sensor with round style plugs, so no Pre-Cats were used (I will change if I run across any)  1999s used the 3 pin oil pressure sensor, 96-01 style TPS sensors.  \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-1999-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 1999 Harness\u003c\/a\u003e  - Chrysler Part Number - 56042201\u003cbr\u003e\u003cbr\u003e - 2000-2001 Year models  at the time of making this listing, I can't think of a difference in these harness but they do have different part number, so I can't say they are the same harness, but they had the \"california\" or \"standard\" emission models. Standard have no Pre-Cats and one upstream and one downstream 02 sensor with round style plugs along with just one large catalytic converter behind the crossmember. These will have the plug on the coil pack up and down, vertical. These have the 00-04 Pin out for the Transmissions. 2000-2001 used the 3 pin oil pressure sensor, 96-01 style TPS sensors.  - \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2000-2001-years?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2000 Year Harness\u003c\/a\u003e - Chrysler Part Number - 56044400    2001 -Chrysler Part Number 56044769\u003cbr\u003e\u003cbr\u003e - 2002 is a standalone year for a harness. These should all have the Pre Cats with the Four 02 sensors with the start year of the square wire connection plugs. These do not have 02 sensors close to the muffler area. These started with the newer TPS style plugs. They are still using the older 3 pin oil pressure sensor switch. \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2002-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2002\u003c\/a\u003e - Chrysler Part Number 56041989\u003cbr\u003e\u003cbr\u003e\u003cem\u003e- 2002-2003 - The ONLY difference that I am aware of between these years is 2002 uses the three pin\/ three wire oil pressure sensor where as the 2003 uses the one wire oil pressure sensor. If you are in a need for either, you could run either one and simply not have an oil pressure reading or install a manual gauge. My dads daily driver has an 02 harness on an 03 Jeep and just doesn't read oil pressure.\u003c\/em\u003e\u003cbr\u003e\u003cbr\u003e- 2003 is a standalone year harness. These should all have the Pre Cats with the Four 02 sensors. These do not have 02 sensors close to the muffler area. These use the newer square style wire connector plugs. These are basically the same as 2002s harness, they swapped to the single wire oil pressure sensors.  - \u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2003-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2003\u003c\/a\u003e - Chrysler Part Number 56044369 - 2WD \u0026amp; 5604470 4wd\u003cbr\u003e\u003cbr\u003e - 2004 is a completely standoff year with only 2004 working for this year. The actual only difference from a 2003 is a 2004 model swapped to a new style MAP sensor. This COULD be re wired to either plug style you need but they are technically different harnesses. Some, but not all 2004s have the new updated style injector plug, but this is the same plug, just a different disconnect lever and lock. 1999-2004.5 older connectors were bad with the locks breaking. These use the new style Square Connector for the 02 Sensors. -\u003ca href=\"https:\/\/www.dexjs.com\/products\/engine-wiring-harness-jeep-grand-cherokee-wj-4-0l-2004-year-only?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR 2004\u003c\/a\u003e - Chrysler Part Number 56050469 2WD \u0026amp; 5605047 4WD\u003cbr\u003e\u003cbr\u003e - All the information above should tell you the differences in the harnesses. I will try to list below what plugs never changed. I hope I don't miss any but this information comes from my brain so I could make a mistake.\u003cbr\u003e\u003cbr\u003e- Things that are all the same\u003cbr\u003e - Idle Air Control Valve - IAC\u003cbr\u003e - Air Temp Sensor\u003cbr\u003e - Injectors (aside from 2004 Update)\u003cbr\u003e - Coolant Temp Sensor\u003cbr\u003e - A\/C Clutch Plug\u003cbr\u003e - Coil Pack Plug Style -Aside From 1999 Orientation \u003cbr\u003e - Crankshaft Sensor Plug - CPS\u003cbr\u003e - Cam Sensor - Pick Up Coil\u003cbr\u003e - Computer Ground - Knock Sensor\u003cbr\u003e   Little One Wire Sensor by The Dipstick\u003cbr\u003e - Two PCM Plugs\u003cbr\u003e - Two Main Harness - Body Plugs\u003cbr\u003e - Park Neutral Switch \u003cbr\u003e - Main Transmission Valve Body Plug (1999 Pinout)\u003cbr\u003e - Tran Output Speed Sensor Plug \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"Default Title","offer_id":54309208785209,"sku":"56044769","price":250.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/IMG-0974.heic?v=1786119665"},{"product_id":"discounted-engine-wiring-harness-jeep-cherokee-xj-2000-2001-four-02-sensors-copy","title":"DISCOUNTED #1 - Engine Wiring Harness - Jeep Cherokee XJ - 2000-2001 - Four 02 Sensors (Copy)","description":"\u003cp\u003e\u003cstrong\u003e - THIS HARNESS HAS TWO ISSUES - COIL PACK PLUG WAS CUT OFF, I SOLDERED A NEW ONE BACK ON - REAR SPEED SENSOR PLUG IS RIPPED OFF. SEE PICTURES AND VIDEO FOR FULL DETAILS.  - IF I FIX AND RUN IT ON THE TEST STAND PRICE WILL GO UP.  - ALSO PLASTIC COVER IS MISSING. \u003cbr\u003e\u003cbr\u003e - Video in Pictures - SOLD AS - IS \u003cbr\u003e\u003cbr\u003e\u003cem\u003e- Everything below here is words from my normal listing. \u003c\/em\u003e\u003cbr\u003e\u003cbr\u003ePLEASE READ VERY WELL BEFORE PURCHASING\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the \"Engine Wiring Harness\" for a 2000-2001 Jeep Cherokee 4.0 Inline Six Cylinder Engine WITH Four Oxygen Sensors - Pre Catalytic Converters. This has the two main plugs into the PCM and goes to basically ALL the sensors on the engine. Also has the big main black plug around the transmission dipstick area that connects into the main body harness (click below for it) Make SURE you know what you are purchasing, Look pictures carefully!\u003cbr\u003e\u003cbr\u003e - This was pulled from a 2001 Jeep Cherokee, I don't have systems to tell me which years interchange, but I KNOW these are only for 2000-2001 Jeep Cherokee XJs 4.0s. \u003cbr\u003e\u003cbr\u003e- This is NOT the \"Fuse Box Under Hood Harness\" \u003ca href=\"https:\/\/www.dexjs.com\/products\/harness?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR IT\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e- If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE\u003c\/a\u003e to contact me. I\u003cstrong\u003e DO NOT\u003c\/strong\u003e do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part.\u003cbr\u003e\u003cbr\u003e -A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with causing me trouble and taking up time I don't have!!  \u003cbr\u003e\u003cbr\u003e - These come off wrecks or bad engines, so the vehicle was either driving when it wrecked or the jeep was running when the engine blew up. I check these very carefully!! \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"Default Title","offer_id":54314281632057,"sku":"56041502AB -DISCOUNT     114","price":222.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/5D92DD43-DD79-4FCB-A908-AD0BB48D7E1D.jpg?v=1786131158"},{"product_id":"discounted-2-engine-wiring-harness-jeep-cherokee-xj-2000-2001-four-02-sensors-copy-copy","title":"DISCOUNTED #2 - Engine Wiring Harness - Jeep Cherokee XJ - 2000-2001 - Four 02 Sensors (Copy) (Copy)","description":"\u003cp\u003e\u003cstrong\u003e - THIS HARNESS HAS THE TPS, IAC, MAP \u0026amp; AIR TEMP SENSOR PLUGS CUT OFF. EASILY FIXABLE.  SEE VIDEO FOR ACCURATE DESCRIPTION\u003cbr\u003e\u003cbr\u003e - Video in Pictures - SOLD AS - IS \u003cbr\u003e\u003cbr\u003e\u003cem\u003e- Everything below here is words from my normal listing. \u003c\/em\u003e\u003cbr\u003e\u003cbr\u003ePLEASE READ VERY WELL BEFORE PURCHASING\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the \"Engine Wiring Harness\" for a 2000-2001 Jeep Cherokee 4.0 Inline Six Cylinder Engine WITH Four Oxygen Sensors - Pre Catalytic Converters. This has the two main plugs into the PCM and goes to basically ALL the sensors on the engine. Also has the big main black plug around the transmission dipstick area that connects into the main body harness (click below for it) Make SURE you know what you are purchasing, Look pictures carefully!\u003cbr\u003e\u003cbr\u003e - This was pulled from a 2001 Jeep Cherokee, I don't have systems to tell me which years interchange, but I KNOW these are only for 2000-2001 Jeep Cherokee XJs 4.0s. \u003cbr\u003e\u003cbr\u003e- This is NOT the \"Fuse Box Under Hood Harness\" \u003ca href=\"https:\/\/www.dexjs.com\/products\/harness?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR IT\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e- If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE\u003c\/a\u003e to contact me. I\u003cstrong\u003e DO NOT\u003c\/strong\u003e do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part.\u003cbr\u003e\u003cbr\u003e -A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with causing me trouble and taking up time I don't have!!  \u003cbr\u003e\u003cbr\u003e - These come off wrecks or bad engines, so the vehicle was either driving when it wrecked or the jeep was running when the engine blew up. I check these very carefully!! \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"Default Title","offer_id":54314316300601,"sku":"56041502AB -DISCOUNT #2    117","price":152.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/5EA4A554-3C0F-43C4-AC91-9AE5055D51F8.jpg?v=1786135043"},{"product_id":"engine-wiring-harness-jeep-cherokee-xj-2000-2001-two-02-sensors","title":"Engine Wiring Harness - Jeep Cherokee XJ - 2000-2001 - TWO 02 Sensors","description":"\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003ePLEASE READ VERY WELL BEFORE PURCHASING\u003cbr\u003e\u003cbr\u003e I try to include a video of each harness sold - Check Images.\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the \"Engine Wiring Harness\" for a 2000-2001 Jeep Cherokee 4.0 Inline Six Cylinder Engine With \u003cstrong\u003eTWO\u003c\/strong\u003e Oxygen Sensors - This One Does \u003cstrong\u003eNOT\u003c\/strong\u003e Have Pre Catalytic Converters.\u003cbr\u003e\u003cbr\u003e- Some May Call These - Federal Emissions - \u003cbr\u003e\u003cbr\u003e - This has the two main plugs into the PCM and goes to basically ALL the sensors on the engine. Also has the big main black plug around the transmission dipstick area that connects into the main body harness (click below for it) Make SURE you know what you are purchasing, Look pictures carefully!\u003cbr\u003e\u003cbr\u003e - This was pulled from a 2001 Jeep Cherokee, I don't have systems to tell me which years interchange, but I KNOW these are only for 2000-2001 Jeep Cherokee XJs 4.0s. \u003cbr\u003e\u003cbr\u003e- This is NOT the \"Fuse Box Under Hood Harness\" \u003ca href=\"https:\/\/www.dexjs.com\/products\/harness?utm_source=copyToPasteBoard\u0026amp;utm_medium=product-links\u0026amp;utm_content=web\"\u003eCLICK HERE FOR IT\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e- If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE\u003c\/a\u003e to contact me. I\u003cstrong\u003e DO NOT\u003c\/strong\u003e do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part.\u003cbr\u003e\u003cbr\u003e -A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with causing me trouble and taking up time I don't have!!  \u003cbr\u003e\u003cbr\u003e - These come off wrecks or bad engines, so the vehicle was either driving when it wrecked or the jeep was running when the engine blew up. I check these very carefully!! \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"Default Title","offer_id":54460079276345,"sku":"56041498AC   123","price":345.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/5AD7B65B-30E3-4B13-8525-F08D14AF7A5F.jpg?v=1789056484"},{"product_id":"4wd-extension-harness-jeep-grand-cherokee-wj-4-0l-1999-2001","title":"4WD Extension Harness - Jeep Grand Cherokee WJ - 4.0L - 1999-2001 -","description":"\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e- This is the small extension harness to extend from the main engine\/transmission wiring harness to the 4WD indicator switch to illuminate the dash lights.\u003cbr\u003e\u003cbr\u003e - These were used on the 1999 - 2000 - 2001 Jeep Grand Cherokee WJs. \u003cbr\u003e\u003cbr\u003e - At the moment I am only aware of 4.0 using them - Not sure about 4.7 V8s as of 9-9-2026 - Dex \u003cbr\u003e\u003cbr\u003e I have not seen these listed anywhere else for sale!!\u003cbr\u003e\u003cbr\u003e \u003cspan style=\"text-decoration: underline; color: rgb(255, 42, 0);\"\u003e-NOT FOR JEEP CHEROKEE XJ- \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"Default Title","offer_id":54460256158009,"sku":"56041438   BOX B3","price":36.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/978ABFC0-75C5-484A-91C9-BC32E56ACAE9.jpg?v=1789057034"},{"product_id":"alternator-wiring-harness-starter-wiring-grand-cherokee-wj-zj-all-years","title":"Alternator Wiring Harness - Starter Wiring - Grand Cherokee WJ \u0026 ZJ - ALL YEARS","description":"\u003cp\u003e\u003cstrong\u003ePLEASE READ VERY WELL BEFORE PURCHASING\u003cbr\u003e\u003cbr\u003e- If you Have Not Noticed, This Listing is not 100% done. I am just busy elsewhere!! - Dex - 9-20-2026 \u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003eThis is the \"Alternator Wiring Harness\" for a Jeep Grand Cherokee 4.0 Inline Six Cylinder. This has a smaller rectangle connector, 3 Pin, It connects between the battery box and connects to the Alternator, Small Starter wire, Also has the main Positive \u0026amp; Grounds from the battery to block \u0026amp; starter. \u003cbr\u003e\u003cbr\u003e- These will usually need new battery terminal ends - NOT As Often OEM on WJs\u003cbr\u003e\u003cbr\u003e - 2002 -2004 - WJ - Chrysler Part Number -  56050276\u003cbr\u003e\u003cbr\u003e- 1999-2001 - WJ -  Chrysler Part Number - \u003cbr\u003e\u003cbr\u003e - 1996-1998 - ZJ - SOON\u003cbr\u003e\u003cbr\u003e - 1993-1995 - ZJ - SOON\u003cbr\u003e\u003cbr\u003e- If you are concerned with this being the right or wrong harness for your jeep email me at dexjeeps@gmail.com or \u003ca href=\"https:\/\/www.dexjs.com\/policies\/contact-information\"\u003eCLICK HERE\u003c\/a\u003e to contact me. I\u003cstrong\u003e DO NOT\u003c\/strong\u003e do refunds on wiring harnesses unless its an issue I feel I missed or feel like I sold you the wrong part.\u003cbr\u003e\u003cbr\u003e -A person may miss diagnose an issue as a bad harness and want to buy one to try to fix their issue, then return it if it didn't fix a problem they were dealing with causing me trouble and taking up time I don't have!!  \u003cbr\u003e\u003cbr\u003e - These come off wrecks or bad engines, so the vehicle was either driving when it wrecked or the jeep was running when the engine blew up. I check these very carefully!! \u003c\/p\u003e","brand":"DeXJ's","offers":[{"title":"2002-2004 - WJ - 4.0","offer_id":54501858050361,"sku":"56050276   BOX C5","price":75.0,"currency_code":"USD","in_stock":true},{"title":"1999-2001 - WJ - 4.0","offer_id":54501816926521,"sku":null,"price":74.0,"currency_code":"USD","in_stock":false},{"title":"1996-1998 - ZJ - 4.0","offer_id":54501816959289,"sku":null,"price":65.0,"currency_code":"USD","in_stock":false},{"title":"1993-1995 - ZJ - 4.0","offer_id":54501816992057,"sku":null,"price":70.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5379\/2057\/files\/1472E6BC-B430-49D0-83FA-B19342BD0B83.jpg?v=1789757967"}],"url":"https:\/\/www.dexjs.com\/collections\/engine-under-hood-harness.oembed?page=2","provider":"DeXJ's","version":"1.0","type":"link"}