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  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. Powered Converter
THIS ITEM IS NOT A FIT FOR
2021 Ram 3500

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

Item # 118535
Retail:$103.53
Our Price: $64.20
You Save: 38%
Custom Fit Vehicle Wiring
Not Confirmed to Fit

2021 Ram 3500

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Shipping Weight: 1.6 lbs
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T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector Powered Converter 118535
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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. Powered ModuLite reduces strain on wiring system. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number 118535 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.
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  • Reviews (38)
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Tekonsha Custom Fit Vehicle Wiring - 118535

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • Powered 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. Powered ModuLite reduces strain on wiring system.


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
    • Locate connection points in trunk
    • Plug in T-connector
    • Run hot lead to car battery
  • Includes ModuLite to ensure that your vehicle's wiring matches that of your trailer
    • Powered module connects directly to battery to avoid overloading vehicle's electrical system
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage:
    • Stop/turn lights: 2.1 amps per circuit
    • Tail lights: 5.6 amps per circuit
  • 1-Year limited warranty


Installation

This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located inside your trunk, behind the tail lights on both the driver's side and passenger's side. You will need to remove some interior trim or carpeting to access the harness. Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery and insert the provided fuse.


Once installation is complete, the 4-way flat connector will be stowed within your trunk.


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.


ModuLite Powered Tail Light Converter

A ModuLite power module is built into this T-One connector. Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of your trailer. This power module functions as a tail light converter to combine the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.


With a ModuLite, your trailer's lights will be powered without overloading your vehicle's electrical system. Because the module draws power directly from your car's battery and bypasses the electrical routes that are used by a basic wiring harness, there is virtually no draw on your tail light circuits.



118535 Tow Ready T-1 T-Connector - 4 Wire - Modu-Lite

Installation Details 118535 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 - 118535

Average Customer Rating:  4.7 out of 5 stars   (38 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. Powered ModuLite reduces strain on wiring system.

by:

Works well



by:

Very good transaction and friendly service, thanks guys and gals.



by:

I was very pleased with the harness. The directions were easy to follow. There was a ground wire right next to where I mounted the black box so I didn't have to drill a ground hole. Very Pleased. Thank You

Mike

1/28/2014

I could not be happier with e-trailer. The harness plugged right in and worked perfectly. Great product from a great company.



by:

Seemed expensive, but was complicated to make the old style trailer lights work with the new low power LED lights that don't use the same circuit for brakes and turn signals like the old cars did. The instructions worked, and all of the components were there and plugged in like they said it would . I just use the trailer occasionally, so i just leave the "pigtail" in the trunk until i need it.



by:

easy to install and fit well



by:

Completely satisfied with the trailer hitch. The installation was much easier than I expected, and the engineering thought behind the installation was remarkable. I especially liked the spring like feature on the mounting bolts to help guide the bolts into the proper location on the vehicle. Good Job!



by:
2008 Cadillac DTS

Slightly more involved than your basic pigtail but the installation video helped tremendously. The only nit I had was that the ground wire for the power unit could stand to be a little longer. Very satisfied.



by:
2011 Cadillac DTS

Fit and installation were and are a piece of cake. Working great after more than a year !

James S.

1/29/2018

Super, I trailer my Harley to Daytona Beach Fla. every year. Easy connect easy stow when not in use.



by:

The website is super easy to use. Terrific [online] how-to videos brought me to the site. I’ve never come across a more efficient online buying experience. Two things could be improved: one, the how-to video covered an earlier model than my car, and I had to figure out some differences for my particular application on my own, which took me awhile. Second - and this is a fault with the manufacturer, not the seller - the tongue offered with the trailer hitch was a poor fit for my car. It needs to be redesigned. It will give me some problems that I shouldn’t have to deal with on a model/specific fit.



by:

I g ot the hitch for my cad. and it fit up under the car very satisfactry
The wiring was simple but putting the hitch and the wiring was aq litle time consuming for me as a amerture i was a little slow getting it on.
I do like the way it fits and everthing
THanks Richard Walker



by:

The etrailer.com group did a great job getting me the correct hitch and wiring kit in a timely manner.
The product fit perfectly!

Thank you etrailer.com



by:
2006 Cadillac DTS

WIRING HARNESS WENT IN WITHOUT A PROBLEM. ONLY CHALLENGE WAS ROUTING THE HOT WIRE TO THE BATTERY UNDER THE REAR SEAT. INSTRUCTIONS WERE VERY GOOD AND EASY TO FOLLOW.



by:
2006 Cadillac DTS

The product is fine but the tracking is hard to determine when it will arrive



by:
2011 Cadillac DTS

The installation videos make this easy to install, and made the sale for me. Just terrific and specific to my car.



by:
2011 Cadillac DTS

Wire set arrived very quickly. The it was exactly what I wanted to make the installation easy when compared to other wiring kits



by:
2006 Cadillac DTS

wire a little to short from black box to driver side connecter. Longer on you tube vid. difficulty mounting box. need tacker.



by:
2010 Cadillac DTS

The Tekonsha wiring kit is well constructed and etrailer has good pricing and fast shipping. I recommend this product.



by:
2007 Cadillac DTS

Product is great UPS on the other hand dropped it at a different location had to go look for it after I noticed it was delivered and I did not have it. I will order again your service is very fast not your fault for UPS.



by:

Young man named Jesse took my order. He was very upbeat, knowledgeable, thorough, polite and helpful. I have done business with your company before and it is always a pleasure The items were received timely and in good condition. You're a great company... Keep it up.



by:

My only complaint is that instructions need be a little more detailed for those of us that have never installed this product before!



by:

Works great and easy to understand instructions



by:

Perfect fit. Wiring diagram and instructions were clear on what to do..



by:

The best service I've ever had!



by:

aqppears to require a 12 ga power lead

Etrailer Expert

Jordan F.

2/9/2021

This product does include a 12 guage power lead. This ensures your trailer wiring wont effect the OEM wiring on your vehicle.



by:

The kit was complete with everything needed to hook up and operate.


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Show More Reviews

See what our Experts say about this Tekonsha Custom Fit Vehicle Wiring

  • Which Hitch is Better for a 2008 Cadillac DTS?
    I would be happy to help you. Both the Curt item # C12058 and the Draw-Tite item # 36287 trailer hitches are confirmed to fit your 2008 Cadillac DTS. The hitches are identical in everyway except for the name stamped on them. They have the same capacity, installation method, and dimensions. I recommend going with whichever one is the least expensive. The Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector item # 118535 you were looking at is confirmed to fit your...
    view full answer...
  • Recommended Hitch and Wiring Harness for a 2011 Cadillac DTS
    To add a trailer hitch to your 2011 Cadillac DTS you will want the Draw-Tite Trailer Hitch item # 36287. This hitch is custom fit and bolts to your Cadillac with included hardware. This is a class II hitch with a 1-1/4" receiver. It has a 3,500 lbs towing capacity, and a 300 lbs maximum tongue weight. I checked with our vendors no one made a 2" class III hitch for your vehicle. For a compatible wiring harness you will want the Tekonsha item # TK26VR. This custom-fit T-One connector plugs...
    view full answer...
    Image 1 for Image 2 for
  • Recommended Hitch and Wiring for 2006 Cadillac DTS Towing a Small Utility Trailer
    Unless I am mistaken, it sounds like you are needing a receiver hitch. The Roadmaster Tracker Tow Bar you mentioned, part # RM-020 is intended for towing a car behind an RV. For your 2006 Cadillac DTS, I would recommend the Draw-Tite Class II Receiver Hitch, part # 36287. All necessary installation hardware, as well as the draw bar and the pin and clip used to hold the draw bar into the receiver is included. To complete your towing system, you will also need: Tow Ready Wiring Harness,...
    view full answer...
  • Wiring a 2008 Cadillac DTS to Tow A Small Trailer
    The only wiring harness we carry for a 2008 Cadillac DTS is the Tekonsha # 118535. It plugs into the car's wiring behind both tail lights. Then you'll need to run the hot lead to the Cadillac's battery and insert the included fuse. I've attached a video of when we installed the harness in a DTS for you to take a look at.
    view full answer...
  • Can a 2007 Cadillac DTS with LED Tail Lights Tow a Trailer with Incandescent Lights
    You can tow a trailer with incandescent lights to a vehicle with LED lights. There are only issues on some vehicles when towing a trailer that has LED lights. What allows you to use a T-connector type of wiring harness like # 118535 on a vehicle with LED tail lights like your 2007 Cadillac DTS is a powered converter. A powered converter gets power for the trailer lights directly from the vehicle battery. It receives the signals from the connections to the tail lights but the vast majority...
    view full answer...
  • Can a 2007 Cadillac CTS Be Flat-Towed
    Some vehicles that are not tow-able in their stock state can be equipped to make them flat-towable through the addition of a transmission lube pump or a drive-line disconnect to prevent damage to the transmission. I suggest you refer to your CTS owner's manual or consult with your local dealership to determine if your particular vehicle can be equipped as required for flat towing. For reference I have linked you to an article that covers the essentials of flat-towing, including all of...
    view full answer...
  • Can 2009 Cadillac DTS Tow Trailer
    Hey Dan, it looks like the 2009 Cadillac DTS has a towing capacity of 1000 lbs so as long as the trailer weighs less than that it could tow a trailer. We have a trailer hitch that fits your vehicle with the Curt # C12058 and then for trailer wiring you'd need the part # 118535 as well.
    view full answer...

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


Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Adam R
Expert Research:
Adam R
Employee Joshua S
Video by:
Joshua S
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 Steven C
Installed by:
Steven C
Employee Chris R
Video Edited:
Chris R

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