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  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 for Factory Tow Package - 4-Pole Flat Trailer Connector

T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

Item # 118270
Our Price: $38.91
You Save: 33%
Custom Fit Vehicle Wiring

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T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector No Converter 118270
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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-One connector plugs directly into OEM tow package harness - no cutting, splicing or tapping required. 1-833-496-1390 to order Tekonsha custom fit vehicle wiring part number 118270 or order online at Free expert support on all Tekonsha products. Great prices and Fastest Shipping for T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (454)
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  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 118270

  • 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 harness. T-One connector plugs directly into OEM tow package harness - no cutting, splicing or tapping required.


  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Designed for use with a factory tow package
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Insert fuses and relays (included) in engine compartment
    • Locate connection points beneath your vehicle, along the frame rail
    • Plug in connectors
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


  • Maximum amperage:
    • Stop/turn lights: 7.5 amps per circuit
    • Tail lights: 7.5 amps per circuit
  • 1-Year limited warranty


This custom-fit T-One connector plugs into your vehicle's factory tow package wiring harness, which is located beneath the vehicle, near the frame rail on the passenger's side. Once you've plugged in the connectors, insert the included fuses and relays into their locations in the fusebox, which is located in the engine compartment.

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.

118270 Tow Ready T-1 T-Connector - OE Replacement 4-Flat

Installation Details 118270 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector - 118270

Average Customer Rating:  4.9 out of 5 stars   (454 Customer Reviews)

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

2015 Buick Enclave

I ordered a hitch kit, along with the wiring harness for my 2015 Buick Enclave. They arrived in 3 days with free shipping. I watched the installation video on YouTube twice. I but my car rear wheels on a set of ramps and the installation was complete in about 45 minutes. It was super-easy and EXACTLY as the video had shown. Rarely does a company exceed expectations so completely. Ordering was easy. Shipping was fast. The quality of the hitch and wiring harness are great. The videos for both the hitch and the wiring harness installations were very well done and easy to follow. The hitch was a perfect fit on my vehicle, no adjustments, adapters, spacers, etc. Icing on the cake is that the factory trim plate covers the hitch when not in use, you can't even tell it's there. A big thank you, super impressive!

Id be happy to help you with this. This key is a direct replacement key for a SportRack bike rack, roof box, roof rack, and ski or snowboard racks. In order to find the correct key for your application, you will need to get the number off of the front of the locking core.
-- Etrailer Expert Katrina B - 07/25/2022

2013 Buick Enclave

Gave this order 5 stars for the prompt service and the product was just as described. I ordered a drawtite Hitch and wiring connector for my 2013 Buick Enclave. The hitch and wiring connector arrived quickly. I also ordered a bracket for the four wire connector within 10 minutes of the first order, which was shipped first, it was shipped by the USPS. All of the items fit perfectly and was easy to install following the excellent instructions. Great job! Recommend etrailer for all your towing needs.

perfect fit working fine
Kershaw G - 08/06/2018


Easy installation. Everything fit perfect. Wiring harness was a little tricky but the manufactures plug was hard to get to. After installation I was able to put my access door back on.

2016 Buick Enclave

Works great. Watch harness installation video in advance makes it easier!


Excellent hitch and wiring harness from e-trailer. It fits perfectly looks like it was factory mounted, and my factory installed access cover is still able to be used. Love it!


This kit was so easy to install. The directions covered everything I needed to know to complete the install. It also came in quick. Works great.

2015 GMC Acadia

It has been a year since I installed the receiver and wiring harness on my 2015 GMC Acadia. I am very pleased. They have gotten used a lot. I do lawn care and use it to pull my trailer. I drove my trailer with my Harley Davidson on it all the way to Tennessee. I would recommend the little wiring harness support bracket that I purchased on every order. It is great and makes the 4 flat plug look tidy bu not dangling down or being tied up. No issues at all. Thank you E-Trailer for inquiring about it after it has been installed for a year.


Great product..."Plug and play" with my vehicle. Clear directions for install.


very easy installation. hardest part was removing the rear bumper. and it was fairly easy( i worked as a body man for 43yrs.) seems to be of good quality. i havent had any issues yet. just plug in connecter and go.

perfect!!! use for my trailer and carrier for my wifes wheelchair. no problems!!
RAYMOND L - 12/06/2021


Great service, prompt shipping. Great product. It worked great. Thanks for the follow-up too!


Great products fit perfectly !


I've been buying T-One harnesses from George for years, they always fit and work perfectly and George always has the best prices and he ships fast, too!

2015 Chevrolet Traverse

Purchased hitch and wiring harness.
products. Easy to install.
Fast delivery.


Received products as ordered. Product was simple to install on my vehicle. Overall an excellent experience!

Very well! No problems.
Howard - 04/29/2022


Hi. The hitch and wiring fit like a glove. Looks
Like it came from the factory new. Love the
fact the draw tie hitch can hide away under the
bumper cover. Highly recommend this
Product. I will pass the word about your
company to all my contacts in the business.
Thanks for all your help Stephanie. Look
Forward to doing business with you again

2014 Buick Enclave

Item worked perfectly. Hardest part was locating the trailer plug on 2014 Buick Enclave it is hidden and hard to reach on this car.

2015 Chevrolet Traverse

Great instructions that are easy to understand. Easy install - takes minimal time. It fit my 2015 traverse with zero issues and has been working perfectly!


Great product! Easy to follow instructions. Everything needed came in the kit. I also watched an [online] video from etrailer before installation which made the job sho much easier. Thank you.


Easy to use works great


Fit 2014 GMC Acadia SLE-1 that did not come with a factory tow package. Easy to install. Best price I found. Seems like quality materials and build. Highly recommend.

Great product that will last! I still highly recommend this product
Kou - 11/11/2021


simple, easy install,,, have purchased all my customers' harnesses from here,, as well as a few hitch's


THANK YOU! I got a hitch receiver and wire. Adam was very helpful to make sure I got the right products I needed for my vehicle. Very easy installation!


Fit perfectly


Great product. Everything you need to wire up a trailer. Easy to install with excellent directions.

I have not had any issues with the wiring harness for me be hitch. Great quality.
Todd - 11/17/2021


easy to install and fit like a glove. Without this wiring harness connector hooking up a light connection would be a nightmare!!

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