bing tracking image
  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. No Converter
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

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

Item # 118425
Retail:$47.79
Our Price: $35.81
You Save: 25%
Custom Fit Vehicle Wiring

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Orders above $50 qualify for Free Shipping
Shipping Weight: 0.8 lbs
Quantity: 
In Stock
Tekonsha Custom Fit Vehicle Wiring - 118425
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required. 1-833-496-1390 to order Tekonsha custom fit vehicle wiring part number 118425 or order online at etrailer.com. Free expert support on all Tekonsha products. Great prices and Fastest Shipping for T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (345)
  • Q & A (0)
  • Photos
  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 118425

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • No Converter
  • Tekonsha

Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required.


Features:

  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection points behind tail lights
    • Plug in T-connector
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage: 7.5 amps per circuit
  • 1-Year limited warranty


Installation

This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side tail lights. You will have to remove the tail light assemblies to access this harness. If extra length is needed, you can cut the zip tie on the passenger side harness.


T-One Connection Location Points Behind Tail Lights

Once installation is complete, the 4-way flat connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.


It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.



118425 Tow Ready T-1 T-Connector - 4 Wire

Installation Details 118425 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:


Customer Reviews

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

Average Customer Rating:  4.6 out of 5 stars   (345 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required.

by:
2011 Jeep Grand Cherokee

Very dissatisfied with the wiring harness. Way too short. A number of your reviews indicated that this. We had to splice a number of wires. Your solution was to cut the small zip ties on the wires. We did that. Still too short. Probably will not use this product again.`




by:

unit did not fit had to add wire so it would reach from tail light to the other. And this was the second harness I ordered the first one was totally wrong


Comments
It can seem like that there is not enough wire in the harness. To get enough length, all you need to do is cut the zip-tie that holds the two halves together. Peel the bonded wire apart till you get enough length, then you can tie them back with a new zip-tie.
-- Etrailer Expert Jenny N - 11/08/2022


by:
2012 Jeep Grand Cherokee

Perfect product and transaction all around!! Other reviews said wiring was a bit short but cutting a zip tie would help wire length. Worked perfectly. Install was a breeze and went just as smooth as the video provided for my Jeep. Also bought the trailer hitch as well. Installing both took less than 30 mins. If, like me, you were worried about quality because the price is so low. Worry not!!! The quality is there. The inflated price is not. Welds on hitch are good and powder coating is flawless. Wiring is plug and play. (pun intended) If your thinking about buying. STOP. Just buy it and you will be as pleased as I was. ~2012 Jeep Grand Cherokee~




by:
2008 Jeep Cherokee

Awesome...simply Awesome. Everything worked as described. I have a 2008 cherokee and Everything fit perfectly. Thanks you so much!




by:
2012 Jeep Grand Cherokee

I ordered this harness for my Grand Cherokee and couldn't be happier. It came within a few days choosing economy shipping and the installation was ridiculously easy. There is even an online video with step by step instructions for this exact product. I completed the install myself in under 30 minutes. Did a brake/signal check and everything worked perfectly. Great product, great service. Very happy with this purchase.




by:

No problems after a year of use and the install was easy




by:
2009 Jeep Grand Cherokee

This is GREAT !
everything including
wiring harness was a perfect fit. It took me 1 hour and 15 min start to finish for install.
Well done Etrailer




by:
2010 Jeep Grand Cherokee

Wiring harness was so easy to install, it took me less then 30 minutes to get it installed! Way cheaper then uhaul charges! Very happy.




by:

Easy ordering everything arrived quickly! Install was very easy!




by:

Worked perfectly. Easy install




by:
2013 Jeep Grand Cherokee

This wiring harness was easy to install and appears to be well made. Getting the connectors up between the body and bumper cover were the hardest part as its a pretty tight fit, but with a little finagling they will make it through the hole.

I discovered while under my Jeep (recently purchased used) that mine had the connector present for the factory trailer wiring harness, but I proceeded to use this one anyway and it works great.




by:
2007 Jeep Grand Cherokee

Product was super easy to install I've sent a pic of the hitch installed my Jeep is a work in progress thank you for a great product.

Hugh


Comments
awesome love it!!!
Hugh S - 03/25/2018


by:
2009 Jeep Grand Cherokee

Everything fit as it should. The connectors could be a bit more sturdier. Very delicate plastic.




by:

Hello Mr. George J (etrailer.com):
My
experience with etrailer.com was GREAT!!! I purchased a Draw-Tite Trailer Hitch Receiver, T-One Wiring Harness and Four Pole Bracket. Your website, instructions, sales, and shipping were Top Shelf!!!
Many thanks for the GREAT Service!!!!!!!!!!!!!
Sincerely,
Don D.
Waterford, Connecticut


Comments
Hope all is well with you and your team at etrailer!!! The three trailer items I purchased from your company are working GREAT!!! The items are of very good quality and they were priced appropriately. Also, thank you for continuing to send me product updates. Very helpful!!! Thanks for the Great Service!!!
Don D - 04/25/2018


by:
Jeep

Buying from etrailer was very easy and got my order very quick. Website helped ensure that hitch and wiring fit my Jeep. The hitch looks really good and installation was simple. Definitely recommend etrailer!




by:

I think shipping was way to high payed 2-3 day shipping received it in 4 days..not good.... but I did get the item




by:
2010 Jeep Grand Cherokee

The delivery was fast, took it less than a week to come in. This product was so easy to install. It took me an hour to put the hitch and wiring harness in my 2010 Jeep Grand Cherokee. I haven't got to pull anything with it yet but as of right now I think it's a good product.




by:
2007 Jeep Grand Cherokee

Good product with quality connections. My only negative comment is that the wiring could be about 2"-4" longer for my application (2007 Grand Cherokee). The wires were just too short in overall length and made the installation longer than it needed to be. I did get it in, but almost had to remove the rear bumper to make everything fit perfectly. All in the harness works great - install was just a pain as things were tight.


Comments
Works fine - Couldve been 4 longer so it would give a smidge of slack. Pain to install
Andre F - 05/11/2016


by:

Have Jeep Grand Cherokee and have added an etrailer hitch. This wiring harness will complete the project allowing use of utility trailer. Like the fact that no wiring has to be cut or tapped to install. Perfect for my use.


Comments
Still works exactly as expected. Usage down during Covid-19 situation.
Lanier - 06/22/2020


by:
2012 Jeep Grand Cherokee

The product is very easy to install. For those with comments about the wires being too short to get to the passenger side, all you have to do is cut a zip tie on the harness and there is more than enough wire supplied. Installation took about 30 minutes and the video on the website is excellent. The shipping and notification procedures with e-trailer are great. It's a pleasure doing business with them.


Comments
Product is holding up very well. No issues whatsoever. Excellent all the way around. Would recommend without hesitation.
Kyle - 07/15/2014


by:

Easy to install No issues.




by:

The video is exactly what you do and was so helpful. The cords worked great and did come with two small zip ties. So far so good on my hitch. Would recommend getting dielectric grease for the connector.




by:
2011 Jeep Grand Cherokee

The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Item # 118425 came exactly as advertised and installed exactly as shown in the instructional video. Great product, fast service and delivery, liked the email updates on shipping and delivery...


Comments
There has been no issues with the product...still working exactly as it did on the first day.
Max - 07/31/2018


by:
2011 Jeep Grand Cherokee

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.


Comments
To get enough length, all you need to do is cut the zip-tie that holds the two halves together. Peel the bonded wire apart till you get enough length, then you can tie them back with a new zip-tie.
-- Etrailer Expert Patrick B - 11/21/2012


by:
Honda Pilot

Easy to install, works great. Suggestion: watch the video rather than use the included instructions, if possible. The instructions are fine, but the video shows where to route the wires through the bumper. After reading the suggestions in the reviews, I snipped one of the wire ties holding the two cable sets together to make sure I had enough cable length to stretch over to the passenger side. Make sure you have a couple of coat hangers or heavy wire to fish the wires through your bumper pipe. Even though person in the video was able to install the ground screw without drilling a pilot hole, I was not able to, so I needed to drill a pilot hole to get it started.


Comments
The harness works great. I upgraded it to a round 7-wire harness with electric brakes. No need to discard this kit, it simply powers the lights while a new wire powers the brakes on the new 7-wire connector.
Todd S - 03/15/2015

25
345
Show More Reviews

See what our Experts say about this Tekonsha 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...
  • 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, # 118425. 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...
    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...
  • How to Make the Tow Ready Trailer Wiring Harness Long Enough to be Used on 2012 Jeep Grand Cherokee
    There is a pretty simple fix for the issue people have where it seems like the harness is too short. What you will need to do is cut the zip-tie that holds the left and right harnesses together and then pull the wires apart as they are bonded together. This will give you plenty of wire to make it to both taillights of your 2012 Jeep Grand Cherokee. If you check out some of the other reviews you can see that some people had success with this method too.
    view full answer...
  • Trailer Wiring Recommendation for a 2007 Jeep Grand Cherokee without Tow Package
    For trailer wiring for your 2007 Jeep Grand Cherokee you would want the Tow Ready Wiring Harness part # 118425 which is a confirmed fit. It does not require a taillight converter since the taillight circuits of your vehicle match what the trailer wiring standards are. Meaning the turn signals and the brake signals are carried on the same circuit. I attached an install video for this harness for you to check out as well.
    view full answer...
  • Trailer Wiring Recommendation for 2007 Jeep Grand Cherokee
    For a trailer wiring harness confirmed to fit your 2007 Jeep Grand Cherokee you would want the part # 118425 which I attached an install video for as well.
    view full answer...
  • Wiring is Too Short Installing Tow Ready T-One Harness on a 2012 Jeep Grand Cherokee
    There is an installation note right below the specs on the product page of the Tow Ready # 118425 that notes if you need extra length, you can cut the zip tie on the passenger side harness. I have found by researching the previous customers installation experiences, many of them with your vehicle, have had to use this method to gain that extra little bit of wire to finish the installation. In the picture, I have designated the ziptie in question.
    view full answer...
    Image 1 for
  • Does Tekonsha Trailer Wiring for 2011 Jeep Grand Cherokee Require Trip to Jeep Dealer
    For your 2011 Jeep Grand Cherokee the Tekonsha Trailer Wiring kit part # 118425 is a confirmed fit. There would be no need for a trip to the dealership. Basically you just plug the kit in line with your vehicle's taillight wiring and this kit will function. I attached an install video for this kit for you to check out as well.
    view full answer...
  • Trailer Wiring Harness Recommendation for 2007 Jeep Grand Cherokee
    For trailer wiring confirmed as a fit for your 2007 Jeep Grand Cherokee we have the Tekonsha kit part # 118425 which is going to fit and work great. I attached an install video for this kit on a 2007 Grand Cherokee for you to check out as well.
    view full answer...
  • Troubleshooting T1 Trailer Wiring Harness Install that Prevents Vehicle Taillights from Functioning
    The first thing you should check is to make sure you had the connectors firmly seated together. If the connectors weren't totally connected together that would explain the problem. If that doesn't fix the problem I would recommend you inspect the connectors of the harness to make sure there aren't any bent pins or missing pieces that would prevent the circuit from completing. Aside from that it would seem that the harness is at fault and would need to be replaced. I attached an install...
    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...
    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 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 procedure will be very similar and you can...
    view full answer...
  • Troubleshooting T-One Harness On 2010 Jeep Grand Cherokee With Intermittent Blinker
    Many times corrosion can cause problems like you are describing on your 2010 Jeep Grand Cherokee. A loose ground can cause intermittent problems as well. You want to make sure the ground wire is attached to a clean, bare metal surface. If you find green and/or white corrosion inside the connector, that will probably be what is causing the problem. You will need to clean this corrosion out and make sure the connections are secure. If you have it cleaned out and find it is working, I recommend...
    view full answer...
  • Wiring Harness Recommendation for 2014 Jeep Grand Cherokee
    The T-One Vehicle Wiring Harness that you will need for your 2014 Jeep Grand Cherokee is part # 118605. This harness will allow you to quickly and easily install a 4-way trailer connector on your Cherokee. I have also included an installation video for you. The T-One Vehicle Wiring Harness, # 118425, that you mentioned was designed for the 2007-2013 Jeep Grand Cherokee.
    view full answer...
  • Does Wiring Harness for 2011 Jeep Grand Cherokee Require Dealer Activation
    Thank you for purchasing the Draw-Tite # 75699 and Wiring Harness # 118425 for your 2011 Jeep Grand Cherokee directly from us! I can tell you that since this harness plugs in behind the tail lights it will not require you to see the dealer to activate the tow package wiring circuit. You would only need to see a dealer for a wiring harness that plugs into the tow package port. I have added links to video installs of both products on an '11 Grand Cherokee for you as well.
    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...
    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 you need a circuit tester, you could use something like # PTW2993. If the trailer functions properly then...
    view full answer...
  • Comparing Curt and Tow Ready Trailer Wiring for a 2013 Jeep Grand Cherokee without Tow Package
    Both the Tow Ready harness # 118425 and the Curt harness # C56009 install and function the same way on your 2013 Jeep Grand Cherokee without the factory tow package. They are just from 2 different manufacturers. I have linked videos showing example installations of both for you. I usually recommend Tow Ready over Curt because on harnesses with converter boxes the Tow Ready ones seem to be the more reliable option. But in this case there are no converter boxes so you could go either way...
    view full answer...
  • Does Tow Hook of 2013 Jeep Grand Cherokee Have to Come off to Install Hitch
    You are correct that the tow hooks of your 2013 Jeep Grand Cherokee would need to be removed to install the Draw Tite Hitch part # 75699 that you referenced. The hitch attaches to the insides of your frame rails. The tow hook occupies the same area as the hitch so it would have to come off. There really is no difference between Hidden Hitch and Draw Tite hitches as they are both made by the same company. For trailer wiring you would then want the part # 118425 which is a confirmed fit....
    view full answer...
  • Draw Tite or Hidden Hitch for a 2011 Jeep Grand Cherokee
    Draw Tite and Hidden Hitch are both made by the same company Cequent as both brands were acquired by them. There is no difference between the Hidden Hitch 87595 that you referenced and the Draw Tite # 75699. They both would fit your 2011 Jeep Grand Cherokee well. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes...
    view full answer...
  • Parts Needed to Tow a Trailer with a 2011 Jeep Grand Cherokee
    If your 2011 Jeep Grand Cherokee is in need of a trailer hitch you would need the Draw Tite hitch part # 75699 which is a Class III 2 inch hitch confirmed as a fit. For trailer wiring you would want the # 118425 which is a confirmed fit as well. I attached install videos for both products as well. Since you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch...
    view full answer...
  • Trailer Hitch Recommendation for a 2008 Jeep Grand Cherokee Diesel
    Yes, the Curt Hitch part # 13251 that you referenced has been confirmed to fit all models of the 2008 Jeep Grand Cherokee except for the SRT-8 model so it would work well on your diesel model. I attached an install video for you to check out as well. For trailer wiring you would want the part # 118425. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch...
    view full answer...
  • Troubleshooting 7-Way Install on a 2012 Jeep Grand Cherokee that Blinkers Dont Work
    What you can do is test the pins of the wiring harness that you plugged the # 20119 into on your 2012 Jeep Grand Cherokee with a circuit tester like part # PTW2993 to test for voltage when the turn signals are on. If you can't find any pins on the connector that show intermittent voltage when the blinkers are on then it most likely is a programming issue you would need to take the vehicle to a Jeep dealer for.
    view full answer...
  • Troubleshooting T-One 4-Pole Wiring Harness 118425 in 2012 Jeep Grand Cherokee
    Thank you for your purchase of T-One 4-pole trailer wiring harness # 118425 which is a confirmed fit on your 2012 Jeep Grand Cherokee and installation of which is shown in the linked video on a 2013 model year GC. Your issue of certain left-side vehicle lights now not working after you first connected your trailer suggests that your trailer either has a short-circuit somewhere in its wiring or that its total power demand from all of its lights is more than the harness can deliver. Either...
    view full answer...


< Previous
123. . .6



Do you have a question about this Custom Fit Vehicle Wiring?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate custom fit vehicle wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Zack K
Video Edited:
Zack K
Employee Joshua S
Video Edited:
Joshua S
Employee Robert G
Expert Research:
Robert G
Employee Patrick B
Expert Research:
Patrick B
Employee Michael H
Expert Research:
Michael H
Employee Jeff D
Expert Research:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Adam R
Expert Research:
Adam R
Employee Lori W
Expert Research:
Lori W
Employee Nicholas E
Test Fit:
Nicholas E
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Isabelle B
Updated by:
Isabelle B
Employee Cole B
Installed by:
Cole B
Employee Chris R
Video by:
Chris R

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.


Product Experts Available Now!
Call 1-833-496-1390