bing tracking image
  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. 4 Flat
  5. Trailer Hitch Wiring
  6. Converter
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

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

Item # 118437
Retail:$68.39
Our Price: $40.32
You Save: 41%
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.

Add to cart
In Stock
Tekonsha Custom Fit Vehicle Wiring - 118437
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

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. Circuit-protected converter guards against shorts. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number 118437 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 (24)
  • Q & A (0)
  • Photos

Tekonsha Custom Fit Vehicle Wiring - 118437

  • Custom Fit
  • 4 Flat
  • Trailer Hitch Wiring
  • Tekonsha
  • Converter

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. Circuit-protected converter guards against shorts.


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 in trunk
    • Plug in T-connector
  • Includes circuit-protected tail light converter to ensure that your vehicle's wiring matches that of your trailer
    • Provides protection against electrical shorts and overloads
  • 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 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 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.


Circuit-Protected Tail Light Converter

A tail light converter 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. The tail light converter combines 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.


This converter safeguards itself and your vehicle against possible electrical shorts and overloads with integrated short circuit protection. Just install the connector as indicated and rest assured that the wiring system of your vehicle will remain feedback-free.



118437 Tow Ready T-1 T-Connector - 4 Wire

Installation Details 118437 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 - 118437

Average Customer Rating:  4.9 out of 5 stars   (24 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. Circuit-protected converter guards against shorts.

by:

The ultimate in simplicity, truly plug and play, I remember the directions being clear and straightforward the product is ideal for my purposes



by:

My shipment arrived and upon opening the bolts were missing, looked like they had fallen out of the bag that was shrink wrapped to the hitch. Called and spoke to Rose and she had the manufacture over night another hitch. Everything fit great, the wiring kit is too easy, the best I've had. I would highly recommend this company.



by:
Honda Civic

Worked great. Now no can pull things with my Honda Civic as well as my Thule



by:
2006 Honda Civic

Way to go on the shipping materials! Holy cow! Custom box. Hitch arrived pristine. Even after UPS kicked it around. Haha. Awesome service. Thank you.



by:
Honda Civic

It worked out fantastic for me... easy plug in installation... I installed it on to my Honda Civic. I had such good luck that I recommended the equipment to my buddy who had just purchased a Mazda SUV. His wasn't so easy and although the equipment worked fine, he ended up bring the vehicle to a garage because the ground wire needed to be run the entire length of vehicle and through firewall which a regular person may accomplish but not without a bit of a struggle. Just saying all applications are not as easy as they appear, but excellent product and works fine.



by:
2007 Honda Civic

Um.... Simple!!!! the directions were very short, and for good reason, you just plug it into your existing lights. That's pretty sweet. This would get a 5 point rating if the directions said to use the red wire.... I was thinking that since it wasn't in the directions maybe they are used for a different car set-up... but then my trailer lights didn't work correctly... so I guess as to where to plug in the red wires, and it works great. Basically plug them into the break lights and the yellow and green get plugged into your blinkers. Soooo easy!!!!

Etrailer.com sent it to me with the trailer hitch, got it in about 5 days, and installed it within about 25 minutes.



by:
2012 Honda Civic

10 minute install, so easy, I think just about anyone could do this. I was amazed, usually with light kits or fog lamps, it is a project. This was great. Removing the formed carpet and plastic took longer that actually plugging it in and done. Great product e-trailer, glad to have online shopping like this.



by:

Not only the right product but easy self installation and supplied bythe best hitch company in the United States bar none!
Thank you again eTrailer
All other suppliers will sell you a Curt harness that will not match up.



by:

Installation was a breeze, hitch fit perfectly on my 2013 Honda civic.
Highly Recommended AAA++++++



by:

Easy install, good quality and after a year it's still working great. I will continue purchasing from Etrailer for any future needs.



by:
2006 Honda Civic

Simple connections. Just basically you are putting jumpers on the brake, tail lights, and signals. My ground came loose on my teardrop and wasn't working. Thats my fault. Other than that, seamless install! Thanks.



by:

No worries! Snaps in, literally in minutes. It takes longer to take panels off and bunngie tyre well lid up.
Etrailer people are great to work with!
Cheers!



by:
2013 Honda Civic

Great product but was really impressed with the service and follow up from etrailer!



by:

Jared

5/13/2024

After a year the connections are still holding strong and working great. Haven’t had an issue with it. Very pleased.



by:
2007 Honda Civic

Extremly easy to install and has worked great for me



by:

No problems at all thanks



by:

Easy install! Exactly what I needed



by:

Easy to use web sight arrived when was promised



by:

Easy install, no issues



by:
2012 Honda Civic

Easy-to-use, works great.



by:

easy installationinstalled very easily no problems



by:

Good product.Does exactly what you want it to.



by:
2008 Honda Civic



by:


24
24

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

  • Can 2009 Honda Civic Tow 1,000 lb Trailer
    I looked up the towing capacity of your 2009 Honda Civic and it appears to have a 1,000 lb capacity. So if you could keep the trailer under 1,000 lbs total you would be good. You'd need a hitch like the Curt # C11391 that fits your vehicle and has more capacity than needed as well. Then for trailer wiring you'd want the part # 118420 if you have a sedan or part # 118437.
    view full answer...
  • Towing a Small SnowBear Trailer with a 2015 Honda Civic
    The correct hitch ball you will need for your 4x8 SnowBear trailer will be stamped onto the coupler itself. The coupler more than likely uses either a 1-7/8" or 2" hitch ball. In order to set your 2015 Honda Civic up to tow the above trailer you will need a few items such as a trailer hitch, wiring harness, and ball mount/hitch ball. For a trailer hitch confirmed to fit your Civic, I recommend using the Curt Trailer Hitch Receiver part # C11391. I have attached an installation video of...
    view full answer...
  • Trailer Wiring Harness for 2013 Honda Civic Sedan
    My contact at Tow Ready tells me that the connectors that join the wiring harness to the tail light assemblies are different in the sedan, versus the Civic coupe model which is why the # 118437 wiring harness you mention is not compatible with your Civic Sedan. You'd want to use the # 118420, unless you have a Hybrid model in which case you'd use # C59236. We have an install video showing the # 118420 being installed on a 2012 Civic, you can view it by clicking the provided link.
    view full answer...
  • Recommended Trailer Wiring Harness For 2008 Honda Civic Sedan
    From the photo you sent it looks like you have a Civic Sedan and the # C56051 trailer wiring harness is not designed to fit a Sedan model. It is designed to fit the Coupe only. We do have a solution for you though. I recommend the T-One Vehicle Wiring Harness, part # 118420 if your Sedan is not the Si or Hybrid model. This plugs into the connection points in the trunk area. If you have a Sedan and it is an Si or Hybrid model The harnesses we offer have to be hardwired. I recommend part...
    view full answer...
    Image 1 for
  • Dedicated Routing of Trailer Wiring Outside of the Trunk Area on a 2011 Honda Civic
    If you are trying to route the 4-Way connector, like part # 118437, out of the trunk area of your 2011 Civic, you will need to either find a grommet in the truck pan that will allow you to route the connector outside the vehicle, or drill a hole large enough to route the wires through. My information shows that the trailer wiring for a 2011 Civic does not require a power wire to be ran to the vehicle battery. If you need to drill I would recommend cutting the 4-Way connector wires a short...
    view full answer...
  • Trailer Wiring Harness Needed For 2013 Honda Civic Coupe
    I do have an option for the coupe but the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 118420 fits the 2013 Honda Civic Sedan. The wiring harness needed for the 2013 Honda Civic Coupe Excluding SI and Hybrid, is the Tekonsha T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 118437. This wiring harness plugs into your vehicle's wiring located behind the driver's-side and passenger's-side interior trim panels in your rear cargo...
    view full answer...
  • Where do the 3 Connectors from the Tow Ready Harness # 118437 Install onto a Honda Civic
    Since your Honda Civic has separate tail lights, meaning one bulb handles the stop and tail and another handles the turn signal, the third connector will plug into the driver side brake light connector and others will plug into the turn signal harnesses. The connector with the brown, red and white will get plugged inline with the driver side brake light harness. The connector with the yellow and white wire will plug inline with the driver side tail light. The connector with green and...
    view full answer...
  • Trailer Hitch for 2009 Honda Civic to Tow Small Trailers
    We have hitches that fit your 2009 Honda Civic like the Curt part # C11391 which can be used to tow a smaller trailer like you mentioned. This fits both the sedan and couple models. For trailer wiring then you'd need the part # 118420 if you have a sedan or the part # 118437 for a coupe.
    view full answer...
  • Trailer Hitch, Ball Mount, Hitch Ball and Trailer Wiring For a 2007 Honda Civic EX Coupe
    The Curt hitch part # C11391 that you referenced is the correct hitch for your 2007 Honda Civic Ex coupe. For a ball mount you would want the part # C45521 and then for a 2 inch ball you would need the part # A-82. For trailer wiring you would then want the # 118437.
    view full answer...

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


Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Robert G
Expert Research:
Robert G
Employee Jameson C
Expert Research:
Jameson C
Employee Jeffrey L
Expert Research:
Jeffrey L
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

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.