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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 # 118287
Our Price: $48.39
You Save: 24%
Custom Fit Vehicle Wiring

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Shipping Weight: 1.23 lbs
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118287 - Custom Fit Tekonsha Custom Fit Vehicle Wiring
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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 directly into existing wiring - no cutting, splicing or tapping required. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number 118287 or order online at Free expert support on all Tekonsha products. Great prices 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 (82)
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Tekonsha Custom Fit Vehicle Wiring - 118287

  • 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 directly into existing wiring - 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 under vehicle
    • Plug in 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 just beneath your vehicle, on the driver'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 plugs on your automobile and the 7-pole connector itself - to help prevent corrosion.

118287 Tekonsha T-1 T-Connector - 7-Way

Installation Details 118287 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

T-One Vehicle Wiring Harness with 7-Way Trailer Connector - 118287

Average Customer Rating:  4.7 out of 5 stars   (82 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 directly into existing wiring - no cutting, splicing or tapping required.


Hi. Carol C
I received package yesterday
afternoon the box was opened and the the two items were crushed the wiring harness wasn't opened but the mounting bracket was there was a small clear bag with a few screws and the bracket in the box not sure if that's all the parts . The trailer hitch was ripped through the shipping box. Please look at pictures to see if all parts are there . Just need confirmation so when I install everything is good to go.

Etrailer Expert

Jenny N.


I have contacted our Customer Service department who can assist you with determining if any parts are missing.


Wiring harness fit and easy to install


Easy to install and works flawlessly!


Product was perfect, shipping was beyond slow, took almost a month to receive this item when it stated was in stock. That needs to improve at this point of having to wait we could have went to dealer to purchase.

2021 Chevrolet Traverse

Fast, easy online order- timely delivery and good pricing.

2019 Buick Enclave

This is a first-rate product. Very simple to install, since I already had the fascia off to install the hitch. My 2019 Buick Enclave already had the vehicle connector, so it was just a matter of locating the connector, removing the dummy plug and plugging in the trailer harness. I used this harness in conjunction with the Curt Trailer Hitch (Item CU29FR), the short no-drill mount (Item 18140) and the Pollak 7-pin mounting bracket (Item PK12711U).

My only complaint is that the harness is much longer than it needs to be, but too long is obviously better than too short.

2019 Chevrolet Traverse

I purchased a draw-tite hitch, wiring harness, motinting bracket and dielectric grease for my chevy traverse. I am very pleased with quality of these products and service. I do not usually take the time to write reviews, unless the company really impressed me. I am impressed how quickly they got this heavy package to me. They put together excellent installation videos on how to successfully install everything yourself. They delivered great customer service when I reached out to them on missing hardware for the wiring harness mounting bracket. They promptly send me the missing parts. I will come back to etrailer in my next hitch project.


when I installed the 7 pin wiring harness , it stuck out too far for the hitch cover that attaches to the bumper. however I spun the bracket 180 so it was indented, thus allowing cover to fit. Maybe something to mention.Again overall, super happy with how fast the receiver was shipped. Looks great. While not been used yet, it was a great experience installing myself.


This work great, fit perfectly matched with the dielectric grease made a great weather tight connection. I did have to reverse the bracket to allow it to fit with the bumper cover.
Wish I had ordered the grease and bracket at the same time as recommended, my mistake which delayed the installation.


Works perfect

Chevrolet Traverse

Fits My Traverse perfectly


This wiring harness fit my 2020 Chevy Traverse LT, 3LT perfectly! I was able to get the the factory wiring harness without removing and of the panels, rear bumper, or rear facia. It was a quick plug and play installation. Just unhook the plug on the factory harness and insert this harness in its place. The factory harness is located right below the rear driver’s side taillight. I highly recommend this connector for it’s ease of use and the build quality!

2019 Chevrolet Traverse

We purchased a Draw-Tite hitch for a 2019 Traverse. Everything fit perfectly. I had a question about hooking up the 7 way plug cable and the support tech directed me to a video showing how to install the cable. Great service. Thank you!


Just what I needed for my 2019 Buick En clave


The advice and help from etrailer is the reason I purchased everything I needed to install a hitch. I highly recommend etrailer

2020 Chevrolet Traverse

The wires on the plug are so long and it was difficult to get it to stay in place in order to reinstall the bumper. I had to wrap it around the hitch and then fold the rest onto itself and zip tie it in place.

Don't bother wasting your time with this garbage!


Received this product and installed it. It is extremely easy to install as the harness plugs directly into the manufactures plug and works very well. I would definitely purchase another if the need arises.


Worked as advertised. eTrailer did a good instructional video on how to install on my vehicle that made installation easy. Thank you.


Received my trailer wiring before expected. Ashley and E trailer have saved my holiday. Thank you


In my application I had to modify the mount to get the hitch cover to fit when not in use.


Perfect trailer hitch at a great price.

2019 Chevrolet Traverse

It fit perfectly on my 2019 Chevy Traverse and very easy to install. No problem so far after a year.


Easy install and works just fine. Come here for all of my trailering needs, which is often lol.


Worked great as suggested, and was the perfect fit for my Chevy Traverse


Great product, online video made installation so much easier.

Show More Reviews

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

  • Which is Better GM Factory or Aftermarket Hitch and Wiring on my 2020 Chevrolet Traverse
    I looked up what the GM trailer towing package includes for your 2020 Chevy Traverse, and it gives you a hitch that installs through the rear bumper panel of the vehicle just like our Curt part # CU29FR and a 7-way trailer wiring connector just like our # 118287 we just offer it at a much better price! In my opinion it makes more sense to go with the towing products we offer as it's the same if not better quality. If you wanted to do some towing, you might be interested in etrailer ball...
    view full answer...
  • Can Rear Hitch Access Panel Cover Reinstall on 2020 Buick Enclave with Tekonsha 7-Way Installed
    The 7-way kit part # 118287 will fit behind the rear hitch access panel of your 2020 Buick Enclave. You might have to bend the bracket back a little bit so that the cover fits over it but that wouldn't be an issue at all.
    view full answer...
  • Trailer Wiring Recommendation for 2020 Buick Enclave
    We have two really great and easy to install trailer wiring options for your 2020 Buick Enclave. We have the 7-way part # 118287 and the 4-way part # 118761 which plug right into the trailer wiring port at the rear of your vehicle. If you plan to tow a smaller trailer without brakes you'd want the 4-way but if you plan to tow a trailer that has brakes like maybe a slightly larger camper you'd want to go with the 7-way option.
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  • Recommended Trailer Wiring Harness for 2018 Chevy Traverse
    For your 2018 Chevy Traverse I recommend the Tekonsha T-One Vehicle Wiring Harness # 118287 if you need a 7-Way connector or the Tekonsha # 118761 if you need a 4-Way connector. These are both custom harnesses that will install by simply plugging into a factory port beneath the vehicle on the driver's side (see attached image). I recommend these over the Curt options that are also available for your Traverse because of Tekonsha's reputation for producing extremely reliable products. We...
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  • Installing Tekonsha Prodigy P3 Brake Controller on 2018 Buick Enclave
    The Tekonsha Prodigy P3 Trailer Brake Controller # 90195 referenced in your question is an excellent choice and exactly what I would have recommended. There is not a built-in brake controller port on your 2018 Buick Enclave that will allow for installation with a Plug-In Adapter, however all the needed wires should already be run under the dash. In order to install the P3 brake controller, you will just need to connect the 4 wires from the controller to the 4 blunt-cut wires that will...
    view full answer...
  • How to Pick Out Trailer Wiring for 2018 Chevy Traverse
    We have two options for trailer wiring for your 2018 Chevy Traverse. We have the 7-way kit part # 118287 and the 4-way part # 118761. Basically it comes down to what type of connector your trailer has for you to know which you'd need. If your trailer has a round plug for trailer wiring you'd want the part # 118287 or if instead it has a flat connector with 4 wires ran to it you'd want the 4-way part # 118761.
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  • Brake Controller Installation 2020 Chevy Traverse
    Your 2020 Chevy Traverse is prewired for a brake controller. Instead of a connector, there are 4 blunt cut tow package wires located under the dash below and behind where the headlight switch is located. These wires will directly connect with the wires of the pigtail included with your brake controller. The wire bundle should be taped to a larger wiring harness, and will usually have a white tag or label on it. The 4 wires will connect as follows: The blue tow package wire connects to...
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  • Parts Needed to Add 7-Way Trailer Wiring Harness to 2019 Chevy Traverse
    If you wanted to install a 7-way on your 2019 Chevy Traverse without current trailer wiring all you need is the T-One 7-way kit part # 118287 and you'd be set. This plugs right into the trailer wiring port at the rear of your vehicle and will give you a fully functional 7-way. I attached an install video link for this kit for you to check out as well.
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    Image 1 for
  • Trailer Wiring for 2020 Chevy Traverse with 7 and 4 Pole Connectors
    I do have a way for you to have a 7-way and 4-Pole connector on your 2020 Chevrolet Traverse, but there isn't a wiring harness for your car that comes with both plugs. You can use the T-One Vehicle Wiring Harness # 118287, which is confirmed to fit your Traverse, and plugs directly into your factory harness. You can then use the Hopkins # HM40975 in place of the 7-way socket that comes with the harness. The # HM40975 also comes with a mounting bracket to easily attach it.
    view full answer...
  • Best Trailer Hitch and Wiring Harness For 2020 Chevy Traverse Towing A Utility Trailer
    I recommend the Curt Class III Max Frame Receiver Hitch part # CU29FR for the 2020 Chevrolet Traverse because of its concealed cross tube design it provides the best ground clearance compared to the other options. The concealed cross tube design sits up higher since the receiver tube sticks out fascia instead of hanging below the bumper. The receiver tube will be the only portion of the hitch vehicle once it's installed. This hitch also allows you to re-install the panel that hides the...
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    Image 1 for Image 2 for Image 3 for
  • 7-Way Connector and Brake Controller for a 1996 Chevrolet C3500
    To convert the 4-way connector on your 1996 Chevrolet C3500 to a 7-way you will need is the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires item # ETBC7. The kit includes a pre-wired 7- and 4-way trailer connector that mounts easily at the rear of your vehicle with an included bracket. This kit is designed for use on a vehicle with an existing 4-way flat trailer connector and plugs directly into it. You will then connect the blue wire to...
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  • Installing Trailer Brake Controller on 2018 Chevy Traverse
    Based on my research it does look like the 2018 Chevy Traverse is equipped with blunt cut wires beneath the dash for installing a trailer brake controller as part of its standard package. To be certain of this you can visit a local Chevy dealer with your VIN and they will be able to tell you exactly what the vehicle was equipped with at the factory or you can simply check the appropriate location inside the Traverse to see if the wiring is present. On the 2018 Traverse the blunt cut wires...
    view full answer...
  • Adding a 7-Way to 2019 Buick Enclave
    You can easily add a 7-way to your 2019 Buick Enclave. The only thing you need is the T-One Vehicle Wiring Harness with 7-Way Trailer Connector # 118287. To install this you simply need to plug this into the factory harness, which is on the driver's side stashed under the vehicle, as you can see in the cut out of the linked installation instructions I added for you. I also added a link to a video review of this harness for you to take a look at.
    view full answer...
    Image 1 for
  • Recommended Plug and Play Brake Controller for a 2018 Chevrolet Traverse
    Yes, you will need to install a brake controller on your 2018 Chevrolet Traverse in order to activate electric brakes on a trailer. For a plug and play option, there are few better than the Curt Echo Mobile Trailer Brake Controller part # C51180. The reason for this is because it uses a device most individuals are familiar with, their phone which also means you don't have to read a comprehensive manual and learn all the codes. If your phone dies while using the brake controller, the device...
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  • Is 2021 Buick Enclave Pre-Wired From Factory for a Brake Controller
    The 2021 Buick Enclave is pre-wired for a brake controller. If you don't already have a 7-way brake controller, you can install one using part # 118287 which would plug into the connector located under the vehicle on the driver's side just forward of the bumper as shown in the linked video. The Tekonsha Primus you'd looked at, part # TK90160 would be a great choice, and includes the pigtail that connects to the tow package wiring under the dash. The controller would wire up to the blunt...
    view full answer...
  • I Need Both The 4 Flat And 7 Way Trailer Wiring Connectors For My 2022 Chevy Traverse
    You are correct in that the Hopkins # HM40975 will not come with any wiring as it is intended as a factory replacement for an existing damaged one, and that the Tekonsha # 118287 will only have the 7 Way connection and not the 4 Flat. With that said, you will have two options. First is to go with the Tekonsha # 118287 and use a 7 to 4 adapter, like the Pollak # PK12716. Personally, I am not preferable to these as I am prone to misplacing and/or losing things. They do work perfectly fine...
    view full answer...
    Image 1 for
  • Recommended Trailer Hitch for 2020 Chevy Traverse
    For your 2020 Chevrolet Traverse I recommend the Curt # CU29FR. This is a great choice for both towing and accessories. If you're going to be towing a trailer I recommend a wiring harness like part # 118287 and a ball mount that has the correct rise or drop that fits with your trailer.
    view full answer...
  • Replacement 7-Way Recommendation for 2014 Chevy Express Van
    It sounds like you found the USCAR connector at the rear of your 2014 Chevy Express Van which a 7-way normally plugs into like with the Mighty Cord part # A10-7072VP. To see what I am talking about fast forward to the 28 mark of the attached install video.
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  • Recommended 7-Way Wiring For 2020 Buick Enclave
    I recommend the Tekonsha T-One Vehicle Wiring Harness with 7-Way Trailer Connector part # 118287 which will plug into the OEM harness on the driver's side frame rail and give you a 7-way plug on the back of the Enclave. I have attached a video on a 2019 Chevy Traverse but it will be the same on your Enclave. To mount the plug I recommend No-Drill Mount for Electrical Mounting Bracket - Short part # 18140 with Mounting Bracket and Installation Hardware part # PK12711U.
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  • Aftermarket Tow Package Recommendation for 2020 Chevy Traverse Instead of OEM GM Package
    We have an OEM style of hitch solution for your 2020 Chevy Traverse that is going to cost much less than a dealer option and will be just as strong with the Curt hitch part # CU29FR. This hitch hides behind the access panel of your rear fascia just like the OEM hitch does and has plenty of towing capacities. I attached an install video for you to check out too. For trailer wiring then you'd want the OEM style 7-way part # 118287 which easily installs by simply plugging into a port at...
    view full answer...
  • What 4-Way and 7-Way Wiring Do I Need for My 2021 Chevy Traverse with Factory Connectors?
    As far the 4-way for your 2021 Chevy Traverse, you need the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118761. The T-One includes a ModuLite power converter to ensure that your vehicle's wiring matches that of your trailer. With the T-One, you will have full functionality of brake lights and running lights on your vehicle. If you are looking to add a brake controller to the trailer, you will need 7-way wiring for your existing connector. For that wiring, I recommend...
    view full answer...
  • Are Fuses or Relays Needed to Install T-One 7-Way Connector on 2018 Chevy Traverse
    There are no relays or fuses required to install the T-One Vehicle Wiring Harness with 7-Way Trailer Connector # 118287 on your 2018 Chevy Traverse. It will simply plug into a harness under your vehicle and that's all there is to it. I have added a link to the instructions as well as a video installation for you to check out of the T-One Vehicle Wiring Harness # 118287. To complete the towing setup on your 2018 Chevrolet Traverse I recommend the Curt Trailer Hitch Receiver # CU29FR...
    view full answer...
  • Which is Better GM Tow Package or Curt Tow Package for 2019 Chevy Traverse
    I looked up what the GM trailer towing package includes for your 2019 Chevy Traverse and it gives you a hitch that installs through the rear bumper panel of the vehicle (just like our Curt part # CU29FR), and a 7-way trailer wiring connector just like our # 118287 at a much better price as I was able to compare the prices too! In my opinion it makes more sense to go with the towing products we offer as it's the (if not better), quality a much better price. I attached a picture of what...
    view full answer...
  • Will the Curt Trailer Hitch Receiver # C13380 Fit a 2018 Chevrolet Traverse LT
    The Curt Trailer Hitch Receiver # C13380 that you referenced will fit all models of the 2018 Chevrolet Traverse including your LT. I confirmed this with my contact at Curt. This is a Class III hitch with a 2" receiver that has a 5,000 lb Gross Trailer Weight (GTW) rating and a 750 lb Tongue Weight (TW) rating. When use with a Weight Distribution (WD) system the GTW rating is raised to 7,500 lbs but the 750 lb TW remains the same. You will want to verify the weight ratings of your Traverse...
    view full answer...

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

Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Cole B
Installed by:
Cole B
Employee Randy B
Test Fit:
Randy B
Employee Robert C
Test Fit:
Robert C
Employee David F
Test Fit:
David F
Employee Ryan G
Test Fit:
Ryan G
Employee Bradley B
Test Fit:
Bradley B
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
Updated by:
Isabelle B
Employee Alexander C
Written by:
Alexander C
Employee Zach D
Video by:
Zach D
Employee Jonathan Y
Video by:
Jonathan Y

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