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  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 7 Round - Blade
  6. No Converter
T-One Vehicle Wiring Harness with 7-Way Trailer Connector

T-One Vehicle Wiring Harness with 7-Way Trailer Connector

Item # 118272
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Custom Fit Vehicle Wiring

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Custom Fit Vehicle Wiring 118272 - No Converter - Tekonsha
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Quickly and easily install a 7-way, RV-style trailer connector on your vehicle with this custom wiring harness. T-One connector plugs into existing tow connector - no cutting, splicing or tapping required. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number 118272 or order online at Free expert support on all Tekonsha products. Guaranteed Lowest Price and Fastest Shipping for T-One Vehicle Wiring Harness with 7-Way Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (117)
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  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 118272

  • Custom Fit
  • Trailer Hitch Wiring
  • 7 Round - Blade
  • No Converter
  • Tekonsha

Quickly and easily install a 7-way, RV-style trailer connector on your vehicle with this custom wiring harness. T-One connector plugs into existing tow connector - no cutting, splicing or tapping required.


  • Provides a 7-way, blade-style trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 4-pole, 5-pole and 6-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection point behind rear tire
    • Plug in T-connector
  • Constructed of 16-gauge bonded wire
  • 1-Year limited warranty


This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located behind the rear tire, on the passenger's side.

Once installation is complete, the 7-way 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 plug on your automobile and the 7-pole connector itself - to help prevent corrosion.

118272 Tekonsha T-1 T-Connector - 7 Wire

Installation Details 118272 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Reviews

T-One Vehicle Wiring Harness with 7-Way Trailer Connector - 118272

Average Customer Rating:  4.8 out of 5 stars   (117 Customer Reviews)

Quickly and easily install a 7-way, RV-style trailer connector on your vehicle with this custom wiring harness. T-One connector plugs into existing tow connector - no cutting, splicing or tapping required.

2018 Ford Explorer

2018 Ford Explorer Limited. This item needs to include the mounting bracket. I had to shop around for one to finish my project. The instructions were also not clear for my vehicle. There were two sets of wires where it showed one. I took a gamble and choose one. It was more time consuming than expected. The 1 day shipping was also not one day. It took longer than expected to receive it. Otherwise, it works.


Connected perfectly.

Very good and easy to install
Wayne - 03/13/2022


Very quick and easy installation! Looked high and low for the best deal and saved the most money on parts at

2018 Ford Explorer

Would have been excellent if they had included longer zip ties and a mounting plate for this kit instead of trying to purchase another mounting plate for more money

2016 Ford Explorer

Only reason not 5 stars due to initial confusion caused by picture on the product pkg & instructions. Picture shows wire harness with a plug on each end. In fact, one end has 2 plugs installed & the other end is taped off harness w/o a plug. that plug needs to be put together by user & written instructions very minimal. However, true to form, Etailer has an excellent video which cleared this all up. so far works like a charm. Easy install

2018 Ford Explorer

The harness was very easy to mount. I spent about 30 minutes, but could have done it quicker. The instructions could use a bit more explanation on how to insert the individual wires into the back of the plug adapter, which is why I gave it four instead of five stars.


Everything is going fine so far I installed the hitch, T-harness and 7 way plug on my 2019 ford explorer but now I need to find out what relays and fuses I need to install in the vehicle. Do you have a KIT with instructions and maybe a brake controller? Please

According to the Ford website, you will need a 30 amp fuse in location 27 and a relay in location 37. The M-case fuse is available from an auto parts store, but you might need to see the dealer for the necessary relay. To activate power to the brake controller plug under the dash, check location 46 for a 30A J-case fuse and install one if its missing. In the fuse panel in the passenger compartment, make sure theres a 5A fuse installed in location 4. This panel is located under the dash to the left of the steering column. I recommend the Tekonsha P3 brake controller part # 90195
Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional
and the adapter for Ford Explorer part # 3035-P
Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers - Ford, Lincoln, Mercury
. The P3 is our most popular and reliable brake controller.
-- Etrailer Expert Heather A - 09/08/2021


plug n play connection "no brainer".


Wiring harness was a little involved but it was due to Explorer having custom hitch mounted. Overall it did not take long and I am still very happy with my purchase, works great!

Still working as expected and looks like it did the day I installed it. Worked out great!
Michael M - 06/25/2021

2016 Ford Explorer

Just what I needed to replace my damaged wiring harness. This one is made 10 times better than what the dealership had originally "hacked job" installed... only thing left to do is add the electric brake controller. But glad my wife's explorer is back to working with a trailer attached. Thanks again etrailer for the grrat product and for answering my questions.

Been great, have no problems but have only used the trailer hookup a couple of times. But still satisfied with your product.
Michael D - 04/02/2021

2015 Ford Explorer

Attached easily to existing wiring on my 2015 Ford Explorer. Only problem I had was it did not come with a plate to attach the plug to the tow hitch so that was disappointing. Had to make my own, lucky I had a plate from an old set-up that I configured for my use.


Easy install. Mounting Brackett for the plug would have been nice.

I recommend part # PK12711U
Mounting Bracket and Installation Hardware - Pollak 7-Pole, RV-Style Trailer Connector - Vehicle End
as a mounting bracket that you can use. It would be mounted to your bumper.
-- Etrailer Expert Jenny N - 04/13/2022

2014 Ford Explorer

Very easy to install on my 2014 Ford Explorer with towing package. Highly recommend!!


The light kit does not contain the connector mounting bracket. The bracket is shown in the photos of the kit. The kit description does not say the bracket is not included. I am unable to complete my install with out the bracket

The harness comes with the trailer end wires taped together to allow easy routing to the hitch. The issue is no tape was used to insulate the wires from each other. This resulted in multiple blown fuses when i connected the harness to the car.Some additional tape or a warning to not plug in to the car harness until the trailer plug is connected would have avoided the problem
Lou L - 04/20/2020

2012 Ford Explorer

I own a 2012 Ford Explorer Limited. This SUV was missing the wiring harness for the 7 way trailer plug. It also has the 4 rear proximity sensors for rear parking.

This is the correct harness (118272) for my Explorer. Everything plugs in directly and has the correct plug for the Proximity Sensors. One thing you will have to do is connect each wire into the back of the 7 way. Directions and wire colors are correct. The wire ends will snap into the back of the 7 way. They only go in one way, so make sure you have the wire ends oriented the correct way, don't force anything. I tested the 7 way and the proximity sensors and everything is correct.

The only issue is, this does not come with the 4 way connector. Which I don't need. If I ever do, I will just tap into the current harness and purchase the OEM 4 way Ford connector.

2010 Ford Explorer

Normally I dont take the time to write a review, if I'm happy I keep the product, if not I return it. This is one of the few times I dont mind writing a review. Took me 10 minutes to install. The directions are clear and easy to follow. I reviewed the video after I finished and it's not really necessary, maybe a better explanation of wire routing and secuing.
2 suggestions I would like to make. First is include the mounting bracket with the harness. I made my own on the fly, but not everyone will have time or ability to do that. Secondly team up with another company to sell a "new installation kit" I bought the Reese Towpower Trailer Hitch 84034 for my explorer and had to find a wiring harness separate. Would have made it alot easier if I found both in one shot.
Total install time was roughly an hour. I installed the trailer hitch first and then worked on the harness. I should have started with the harness so I could easily route the cable, install the hitch then finish on the cable. Live and learn. Hitch was 45 minutes, wiring was 10, and made a bracket in about 2.


The harness fit perfectly and was easy to install. Yes

2018 Ford Explorer

Plug-n-play literally. Had an aftermarket hitch installed on my 2018 explorer with a 4 pin connector for a u-haul car hauler. Working on getting my own flatbed car hauler and need the brake controller hookup. Easy instructions - too easy, had to look at it for a minute before realizing how easy it was. Would be better with a mounting bracket but was able to zip tie to the bumper next to the hitch.


Hitch went in without a hitch. The wiring harness routing per the video became a problem and had to come up with another route, otherwise it was very good.

It works well and consistently without any problems
Pat - 05/15/2017

2016 Ford Explorer

Product looks good however I haven't installed it yet due to the fact that I didn't order the mounting bracket for the plug.

For others, you need to order the mounting bracket for this item unless you plan on drilling your bumper or vehicle body.


First wiring harness sent was not correct. This item was recommended by etrailer employee. Telephone call with another employee straightened it out and return was easy. The hitch looks nice, except the screws on the bracket (4) have all rusted and look bad. My vehicle is a Ford Explorer XLT. When it's all washed and waxed it looks great till my eye sees those 4 little screws. You've reminded me how much it bothers me so I will get some quality black screws to replace. I am subtracting a star for the incorrect info I initially received and one for the cheap rusty screws.

2019 Ford Explorer

Worked great easy installation


The wiring harness (pn 118272) fit perfectly, no problem. A little daunting to get the factory connectors apart but after that, simple
The hitch (pn 76034) fit like a dream. HOWEVER, I had to make a trip to get replacements for the 7/16 x 2.5 carriage bolts -- could not in any way tighten the nylon lock nut because the stove bolt shank could not be held in the slot. The replacements were 12mm x 60mm carriage bolts. Draw-tite should change their hardware. Also, the bolts provided to attach the hitch to the car frame were standard zinc coated -- the factory bolts I removed were galvanized. Again, Draw-tIte should change their hardware
The trailer socket with mounting bracket (pn HM40975) just plain will not fit on my car unless I mount it below the receiver (not a good idea). Not sure what I'm going to do yet but may have to fabricate something.
Overall, great product but be prepared to use other than the hardware provided by Draw-Tite.

2019 Ford Explorer

Item came earlier than expected. Quality is good. You do not have to add the wire ends on this harness , but you do push them into the plug. This allows you to have a smaller wire to route prior to adding the end connector...Wiring diagram push pin location is included. Very satisfied..


Great product, well made. My only complaint is that I wish I had noticed it didn’t include mounting bracket for the 7-way hookup

No issues after 1 yr
Michael - 06/11/2020
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