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Custom Fit Vehicle Wiring


 118425  

T-One Vehicle Wiring Harness with 4 Pole Trailer Connector

Tow Ready Custom Fit Vehicle Wiring

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31 reviews


Code:   118425

Retail:$31.58

Price:$24.95

Shipping Weight: 1 pounds

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Tow Ready Custom Fit Vehicle Wiring - 118425

Tow Ready T-One Vehicle Wiring Harness by Draw-Tite, Hidden Hitch and Reese

  • Provides a 4-pole flat trailer connector for the vehicle
  • Quick and Easy
  • No Cutting, Splicing or Taping
  • Just Plug in the T-One Connector and You're Ready to Tow
  • Solid One Piece Construction
  • 16 Gauge Bonded Wire w/ 4-Flat Plug
  • "Factory" Appearance
  • Simple Do-It-Yourself Instructions on Every Package
Can be used with 5-pole, 6-pole or 7-pole adapters.






Video of T-One Vehicle Wiring Harness with 4 Pole Trailer Connector


Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.

Video install trailer wiring 2008 jeep cherokee 118425
Trailer Wiring Harness Installation - 2008 Jeep Grand Cherokee
Video wiring install jeep lorado 2007
Trailer Wiring Harness Installation - 2007 Jeep Laredo

Video Transcript for Trailer Wiring Harness Installation - 2008 Jeep Grand Cherokee

Today we are working on a 2008 Jeep Grand Cherokee. Well be installing Tow Ready T-One connector part number 118425. Our first step is going to be accessing the rear cargo area of the vehicle; were going to need to remove the two push pins that hold in the tail lights. Theres two on the passengers side and two on the drivers side. Then go ahead and pop the tail light lens loose and were just going to let it sit here to the side while we go repeat the same process on the drivers side. On the drivers side with the tail light lens removed from the vehicle we can go ahead and remove the large connector.

Were then going to take our new Tow Ready connector, and this will be the yellow and brown wire and plug it in line with the manufacturers connector. Push it in place and reconnect the red locking tab. Well do the same behind the tail light. Okay with our connections made behind the drivers side, we are going to go ahead and take our wire and route it down between the bumper and the sheet metal. This will feed out below down by the frame of the vehicle.

Theres our four pole, and now we will go ahead and feed down the green and white wire, it is going to be routed over to our passengers side. With our wires fed underneath, we can go ahead and reinstall the tail light for the drivers side. Now we are going to get up underneath the vehicle, route our four pole over the hitch and our green wire over to the passengers side. I am going to follow the inside of the bumper here as it will give me plenty of places to take some zip ties and tie it off. Now that we are over here to the passengers side, just like we ran it down on the drivers side we will run it up on the passengers side between the bumper and the sheet metal of the vehicle.

You can see we have quite a bit more than what we will need so well just take some of that and tie it up here with our wires with a zip tie. Now before we go up behind the passenger tail light and make our connection, we need to go ahead and take our ground wire and ground it. Its the white wire with the ring terminal already on it, and we will just be attaching it with a self tapping screw. With our ground wire secure we can not go ahead and get behind the passengers tail light and make our connection. Just as we did on the drivers side, we will be removing the larger of the two plugs, and plug our new connector inline with the manufacturers wiring.

Then we could go ahead and reinstall our tail light. With the passengers side tail light reinstalled, that completes the installation of our new Tow Ready connector, part number 118425. .


This Product Fits The Following Vehicles

2011 - 2011 Jeep Grand Cherokee All Models

2007 - 2012 Jeep Grand Cherokee All Models, except SRT-8

2007 - 2012 Jeep Grand Cherokee SRT-8 only




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Customer Reviews  -  Write a review about this product

T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

Average Customer Rating:  ratingratingratingratingrating4.6 out of 5 stars   (31 Customer Reviews)




T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: ryan05/17/2011

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good product. easy to install 14481



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Nick V.11/09/2011

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I bought this wiring harness as an after thought. I had purchased the trailer hitch earlier in the year to mount a bike rack on my Grand Cherokee and since I do not own anything that needs to be towed there was no reason for having a harness. Since that time I have had to tow a few thing like a Uhaul trailer and a rented log splitter so now the need is there. I have dealt with eTrailer on other occassions and so far EVERY experience has been a good one. When I decided to get a harness I did not spend any time loooking anywhere else. I had read the reviews and although most were positive I did see a few that were negative about the length of this item. I will admit that on my first attempt I also thought that someone made a mistakewith the length. I did take a few more minutes and tried another route and had more than enough wire. As with my previous purchases I am once again a very satisfied customer. Keep up the good work!26768



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Dan G.08/30/2011

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Very easy install took less than an hour to install hitch and wiring 23200



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Larry06/13/2011

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The product quality is excellent, BUT the 2011 model year JEEP GC has changed. The wiring harness is to short! I had to add additonal wiring by cutting and splicing additional length. This product needs to be upgraded to fit 2011 Jeep Grand Cherokee.16837



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Andrew D.02/04/2012

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I too thought the harness was too short, but it turned out that there is a zip tie holding the passenger side wires to the driver side. You can snip that zip tie off and give yourself some slack. 31060



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Andrew D.02/02/2012

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Very nice product and super easy installation. Took less than 10 minutes from start to finish. Outstanding company to deal with. Never been catered to like I was with etrailer!!30914



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Brandon02/02/2012

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Excellent shipping: quick and FREE! 30912



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Mike H.01/30/2012

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Very Easy to Use, Installed in about 10 minutes and worked perfectly.30573



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Becky01/20/2012

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Installed nicely... 29993



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: JBnFl.12/20/2011

Is this review helpful?


Quick, easy, good to go! Length not a problem for my 2011 Jeep GC. After this experience with the 118425 I'll never spend $200+ on a factory wiring harness and installation again. Seems the Jeep people can't install what they sell and get it to work so thanks to those who know how to make things simple. 28373



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: w carson09/30/2011

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very happy with this the shipping was fast product was great. a+ to etrailer will do more business with you guys anytime and most likely will also. thanks -Carson24871



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: James W.08/27/2011

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made installation a snap---15 minutes or less22916



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Eric H.08/12/2011

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Toughest part was prying off the connectors from the back of the taillights. Easy install after that. Clear directions.21753



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Ron D Canada08/04/2011

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The Hidden Hitch fit and installed exactly like it was described. Very good and clear instructions. Nice neat looking installation. etrailer's service was top notch, delivered in 4 days regular ground service. 21161



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Allen M.08/02/2011

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Great plug and play harness. Everything needed was included in the kit.20922



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Jose S.07/25/2011

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Installation of this harness was very easy after I watched the harness install video. Together with this harness, I also ordered from etrailer, a 10 foot long plastic wire loom (PN 39035) which I used to cover the wires before installation. I thought this would insure protection of the harness wiring as it is routed under the bumper. This harness would have been perfect if it came with the plastic wire loom already installed. It only took me a few more minutes to install the loom so no big deal. The harness was of perfect length and all the connectors just snapped easily.20265



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: John K07/23/2011

Is this review helpful?


Works great and very easy to install but wires could be about 6-12 inches longer which would be easier to het across under the bottom the truck.20065



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Bob07/02/2011

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Have a 2011 Jeep GC- product works great- don't listen to the other reviews about harness being too short. It's close, but you have to watch not to get the small transfer box on harness caught up on anything- that's what it did and I threw a fit, but once I figured it out I had about 1-2in to play with on both tail lamps. The hitch wire/plug has plenty of length- prob about 1ft extra that I zipped up behind bumper cover. I did have to drill a very small hole at the bottom of the rear body for the ground. *Etrailer was very, very fast with the shipping, even with the free shipping. Would definitely buy from again18420



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: sandra d06/13/2011

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Ordered friday and received Monday! Only took about 45 min to install receiver and wire harness. 16885



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: William H04/26/2011

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Another great product, easy to install! Thanks12412



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Matt M.04/17/2011

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Excellent quality and very east to inst all.11877



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: lyle selby kalamazoo mi.04/12/2011

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took about 20min well worth the money just pop out the tail lights and plugg them in11534



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Carey S03/09/2011

Is this review helpful?


Very easy to install and works great, the only problem is the cover for the pins does not fit very well. 8918



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Ken W03/09/2011

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The item came earlier than expected so the service was excellent. The installation was a breeze. Shims were supplied in case you needed them for a tighter fit. It took us maybe 25 minutes total for the installation.8865



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Carl F03/05/2011

Is this review helpful?


The video was great and explained the procedure. With the help of a wire coathanger it was easy to pull the harness up on the right side.I had to run a additional ground wire back to the chassis since my 2011 Grand Cherokee had no place to ground by the tail light housing. Very simple to do.8539



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Kevin C.03/04/2011

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excellent service, fast delivery and followup THANK YOU!8474



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Steve03/03/2011

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Simple installation, plug and go!! 8392



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Ryan K01/27/2011

Is this review helpful?


The item arrived quickly and as promised, but it is not designed the best - the wire that runs between the tail lights should have been between 6-12" longer. The fit was just too tight and I was not able to run it exactly where I wanted due to the short length. That being said, I did get it hooked up quickly (20 minutes) and the instructions and video tutorial were very useful. 6213



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: mike n.06/17/2010

Is this review helpful?


save me lots of time and money I had bought the factory harness for 104 dollars. Waste of money. You have to have them do it because it needs to be programed. I returned it after they wanted 175 dollars to install it. etrailer got me a harness within 4days it only took 5mins to install best decision ever.3142



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Rod R08/01/2009

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Fit my 2009 Grand Cherokee A+ Etrailer.com had this item instock, Shipped it very fast, Product fit my Jeep perfect. Excellent Communication, Their instruction videos helped alot. A+++ Sellers. Thanks!2201



T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425

ratingratingratingratingrating by: Bob11/21/2007

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made for easy install good quality + good fit498




Ask the Experts about this Tow Ready Custom Fit Vehicle Wiring
Expert Answers about T-One Vehicle Wiring Harness with 4 Pole Trailer Connector - 118425                                            Do you have a question about this Custom Fit Vehicle Wiring?


  • Will T-One Harness for a Jeep Grand Cherokee Affect the Vehicle On-Board Diagnostics
  • The custom T-One harness for the Grand Cherokee does not affect the vehicle on-board diagnostics. The harness pulls power for the trailer lights from the same source that provides power for the vehicle tail lights. The system will still monitor the Jeep tail lights for burned bulbs or shorts.
    view full answer...

  • Brake Controller Wiring on a 2007 Jeep Grand Cherokee
  • If your Grand Cherokee tow package included a 7-Way trailer connector at the rear bumper, all you will need is a brake controller to complete the setup. Brake controllers are universal, so any brake controller will work, including the Tekonsha Prodigy, part # 90185. The brake controller will have four wires: Red, Black, Blue and White. As usual, White is ground and should be connected to any suitable ground point. Red is the stop light wire. This tells the brake controller when you are applyi
    view full answer...

  • Wiring Harness and Mount for a 2007 Jeep Grand Cherokee
  • This item works for the Jeep Grand Cherokee (except SRT8) without any dealer involvement. The T-One harness just plugs in line with your existing taillights and then routes down under the bumper to a good location near the hitch. See the installation video link below. The only thing you may need is a mounting bracket to keep the trailer connector up out of the way. I have provided links to a magnetic 4 pole mount and to two brackets; one can be used as a screw on mount and the second can be used
    view full answer...

  • Troubleshooting Lights that Do Not Work on 2007 Jeep Grand Cherokee with Trailer Connected
  • The first thing I would do is check out the trailer wiring and make sure that everything is wired properly and there are no shorted, broken, pinched or frayed wires and that all of the ground connections on the trailer are securely attached. Be sure to check the ground condition where the lights are attached to the brackets and where the brackets are attached to the trailer frame. If the trailer functions properly then there may be too many lights on the trailer for your Jeep Grand Cherokee w
    view full answer...

  • Which Powered Converter Vehicle Wiring Harness Can Be Used on a 2007 Jeep Grand Cherokee
  • For your 2007 Jeep Grand Cherokee, there is a possibility that the camper with all the lights could pull too much electricity for the 118425 custom wiring and your vehicles electrical system. Instead, I recommend using the Upgraded Circuit Protected Modulite with 4 Pole Harness and Hardwire Kit - Includes Testers, # 119176KIT. With this harness, you will have a circuit protected powered modulite that has a connection directly to the vehicles battery. This will allow enough power for the camp
    view full answer...

  • Aftermarket Trailer Hitch and Trailer Wiring Installation on a 2007 Jeep Grand Cherokee
  • The trailer hitches we sell for your 2007 Jeep Grand Cherokee do not require that the rear bumper be removed but the rear fascia does need to be detached so it can be moved out of the way to make room for hitch installation. If your Grand Cherokee has the factory tow hook, it must be permanently removed. To do so, you would have to temporarily remove the rear fascia and a plastic bumper support. The fascia and support get reinstalled near the end of the installation. I have included a link t
    view full answer...

  • Is There A Video Of The Installation Of A Trailer Hitch And Wiring On A 2007 Jeep Grand Cherokee
  • I have a video of the Draw-Tite Class III Hitch, # 75338, and the Hidden Hitch Class III Hitch, # 87752, being installed on a 2007 Jeep Grand Cherokee. The video shows it being installed on a Jeep without a tow hook, so if your Jeep has a tow hook it would have to be permanently removed which adds 20 to 90 minutes to the installation time. I also have a video of the Tow Ready T-One Wiring Harness, # 118425, being installed on a 2007 Jeep Laredo. Even though the vehicle is different, the
    view full answer...

  • How Does Tow Ready T-Connector Harness 118425 Install on a 2009 Jeep Grand Cherokee
  • This harness connects to the connectors on the back side of the tail lights. I have added a link to the instructions below as well as a video of this kit being installed on a 2007 model. They should give you a pretty clear idea as to how the harness installs.
    view full answer...

  • Is there a Quick Connector Trailer Wiring Harness Available for a 2011 Jeep Grand Cherokee
  • The T-One wiring kit, item # 118425, is a quick T-connector kit that installs inline with the vehicle taillight wiring and does not require splicing into the vehicle factory wiring. This connector will provide a 4-Way trailer connector at the rear of your 2011 Jeep Grand Cherokee. The hardest part about installing this wiring harness is accessing the wiring at the rear of the vehicle taillights. We have a video of the # 118425 Harness being installed on a 2007 model which will be very similar
    view full answer...

  • Does a Factory Installed 7-Way on a 2007 Jeep Grand Cherokee Require a Fuse or Relay to Activate
  • If your 2007 Jeep Grand Cherokee came with a factory installed 7-Way wiring harness, it probably does have the 12 volt wire already attached and ready for use. You can check the pin on the 7-Way in the 1 oclock position if facing the connector. Use a circuit tester like # 3808 to check for voltage. On some vehicles you will need to have the key on or the vehicle started. If you find that it does not show voltage, it could be that there is a fuse or relay that needs to be installed. You will n
    view full answer...






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