bing tracking image
  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  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 # 118458
Our Price: $48.96
You Save: 40%
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.

Orders above $99 qualify for Free Shipping
Shipping Weight: 0.86 lbs
Add to cart
In Stock
118458 - Custom Fit Tekonsha Trailer Hitch Wiring
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

In Use/Installed

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 118458 or order online at 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 (114)
  • Q & A (0)
  • Photos

Tekonsha Custom Fit Vehicle Wiring - 118458

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • 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 - no cutting, splicing or tapping required. Circuit-protected converter guards against shorts.


  • 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 rear cargo area
    • 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


  • Maximum amperage:
    • Stop/turn lights: 2.1 amps per circuit
    • Tail lights: 5 amps per circuit
  • 1-Year limited warranty


This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side interior trim panels in your rear cargo area.

Once installation is complete, the 4-way flat connector will be stowed in an out-of-the-way location within your cargo area.

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.

118458 Tow Ready T-1 T-Connector - 4 Wire

Installation Details 118458 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 - 118458

Average Customer Rating:  4.8 out of 5 stars   (114 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.

2006 Pontiac Vibe

Bought this wiring harness for our 2006 Pontiac Vibe, and it was an absolute breeze to install going by the very detailed instructions that came with the harness. I highly recommend this vendor for both the fast shipping and for a very excellent product.

2006 Ford Focus

I have bought 2 tow bars from, one for my 2006 Ford Focus from like 5 years ago, and another for my 2004 Pontiac Vibe this past fall. Both arrived on time and were super simple to install. I had trouble installing my Pontiac Vibe tow bar, but that was because the mounting holes on my car were a bit rusted over. I called customer support who walked me through cleaning those out, and I got it installed right away then. Their wiring harnesses are also super easy to install and the directions are clear and concise. I highly recommend for any towing bar and wire harness needs. I now can tow my sailboat wherever I want to go!

2005 Pontiac Vibe

Gwen really helped me by sending me video with great audio explain in detail how to install the wire harness. at first got frustrated with the paper instructions, after speaking to Gwen, the video she sent and listening to the audio of the color of the bulbs and wire to connect to, it was a snap. Thanks Gwen for you help and great video instructions.


Great dealing with you!


I had my mechanic install it shortly after I received it. He said it was pretty easy to install. It’s been a year now and the wiring harness is still working fine. I’ve made a couple trips back-and-forth from Florida to West Virginia. Pulling a trailer with no issues.

2004 Pontiac Vibe

Quality product, good price, excellent service. On Wednesday, I ordered the full kit: hitch, drawbar, ball, and wiring kit. It all arrived in a single box on Monday with all the pieces properly wrapped and protected. Installation took about an hour, and was straight forward and clean, just like the videos. The wiring kit was just as easy : identify the correct plugs at the tail lights and make the connections. First mission for the new hitch will be to take the patio furniture to my daughter's house.
Amateur tips: I have homemade ramps that give me an extra 4 inches to get under the car. Perfect height. Use a floor jack and 2x6 board to lift the hitch assembly into place without straining. As others have advised, I checked the threads on the car before starting and used anti-seize in case I ever need to remove the hitch. Last item: check the wrench size on the bolts before you start. Instructions said 19mm, but mine were actually 18mm. Found this when the socket "popped" during the torquing process.

Steven C.


Everything is holding up as advertised and as I expected. Without this kit getting supplies and equipment for house projects would be a real headache. This hitch kit makes that process clean and simple. I would recommend this to anybody.

2007 Pontiac Vibe

Wiring was fantastic. Plug and play. Took about 5 minutes to install it!


Installation picture.

Pontiac Vibe

It's not easy to put a hitch on a random 16-year-old car. Luckily my car was in good enough shape, and the frame was not too rusty from the NE USA salty winter roads. I expected to install it myself, but I had it done professionally for $130. I hooked up the wiring harness easily enough thru the large access panels in the Vibe.

2005 Pontiac Vibe

I haven't installed it yet it looks good I checked the plugs it's going to work perfect.

2007 Pontiac Vibe

Wire harness was super easy to install. Only took about 5 mins. I hooked it up to my teardrop camper and all works well.

Travis C.


Its been a year. Still using the wire harness with no issues. I would definitely recommend this product

2006 Pontiac Vibe

We used this and a class II hitch from eTrailer to allow our Pontiac Vibe to pull a little garden trailer. The wiring kit works as advertised.
Don't particularly like having to take in and out the 4pin connector through the hatch, but it works. The wiring and connectors are of good quality and ought to hold up.


All products I have received from etrailer, hitches and wiring harnesses have served my needs well. I greatly appreciated that the 118458 harness did not require running wire to the battery!! Having instruction videos makes your services outstanding.


Installation was idiot proof and the product works as advertised


Super easy to install. Even left it better than OEM by adding protective mesh wrap on all wires. Installations were clear but if you are a visual learner, e-trailer got you covered with multiple of installtion videos for different models. I greatly recommend this product!


This is an OK product that works like it is suppose to but could be a lot better in design. Poor instructions. The instructions do,nt tell you but they intend for you to simply run the flat trailer harness out through where the back hatch closes on it. I refused to do that so I cut it and ran it out a rubber access hole just below the left tail light and spliced,soldered,insulated back together. Much cleaner, professional look underneath.

2007 Pontiac Vibe

Went in perfectly and easily. My experience with this particular piece of equipment was fantastic!

Tyson H.


The parts are great and working perfectly, thank you!

2007 Pontiac Vibe

Went in perfectly and easily. My experience with this particular piece of equipment was fantastic!

Tyson H.


The parts are great and working perfectly, thank you!

2015 Pontiac Vibe

Ordered this wiring kit for my Pontiac Vibe. Shipping was quick, arrived in 4 days. I watched the eTrailer YouTube installation video and literally was able to install the wiring kit in approximately 15 minutes. The wiring kit is high guality and well worth the price. I highly recommend this product.


Wire to left taillight too short - it would only reach if stretched straight across the hatch opening.



Im still happy with them. I now use the setup, with added brakes and an adapter to tow my race car.

2005 Pontiac Vibe

Great product once I figured out what connectors they were talking about. On the drivers side there is a couple of connectors taped together with electrical tape, thought it could be these.
If they would say to remove connectors on the back of the tail l ight assembly it would have been clearer.
But it worked great once we got past that part.

2004 Pontiac Vibe

The hitch attached very easily - no problem at all. The harness was easy to install as well. The hitch looks good on the car - not any more noticeable than necessary. I wanted to get a small economical car but I wanted to be able to carry plywood & sheetrock also - the trailer is the answer. I wasn't sure whether the drawbar rise or drop would be correct when I ordered but the rise was just right.

2005 Pontiac Vibe

This after market 4-pole trailer light adapter worked as advertised on my 2005 Pontiac Vibe. The installation was simple and clean.


Easy to install and works great! It didn't come with double-sided tape, but I don't think that's necessary. If you need to tow a trailer, this is the light kit I'd get.

2005 Pontiac Vibe

I haven't had a chance to use it yet but the installation was a piece of cake. The only complaint I have is that the wire length for the two T-connectors on the drivers side are a bit short. This resulted in the main black box having to be located just within the side cavity rather than the spare wheel well area of my Pontiac Vibe. Not a big deal but a bit annoying. Otherwise great product.

Show More Reviews

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

  • Recommended Trailer Brake Controller and Wiring for 2005 Pontiac Vibe
    To install a trailer brake controller on your 2005 Pontiac Vibe, you will just need a few things. If you do not already have a 4-way connector installed, I recommend the Tekonsha T-One Vehicle Wiring Harness # 118458. This will allow you to quickly install a 4-way trailer connector on your vehicle. No cutting, splicing or tapping into wires is required. I have attached an installation video on your vehicle for you to check out. After the 4-way connector is installed, you will then use...
    view full answer...
  • Changing Idler Hubs on Small 5x8 Trailer to Electric Brakes
    With a smaller trailer like you describe, electric brakes would be my recommendation both from a cost standpoint as well as the ease of installation. For the trailer, you would need two hub/drum assemblies and two brake assemblies. To determine if the hub/drum assemblies we offer are compatible with your trailer spindles, you will need to pull one of your idler hubs off, and look at the inner and outer bearing numbers. The hubs we offer, part # AKHD-545-35-K use # L68149 inner bearings...
    view full answer...
  • Parts Needed to Add Electric Drum Brakes to a Trailer and Brake Controller for 2007 Pontiac Vibe
    There are several parts you will need to add electric brakes to a trailer. First, you need to replace the idler hubs with a hub and drum assembly. The hub and drum assembly that you need will depending on the bearing numbers stamped into the metal of the inner and outer bearings. I have included a link to a video that will help. After you have determine the correct hub and drum assemblies, finding the other parts will be easy. Since you already have a brake mounting flange, you will not...
    view full answer...
  • Difference Between Trailer Hitches for 2004 Pontiac Vibe and Pontiac Vibe GT
    The only difference is that Curt has one trailer hitch that fits a 2004 Pontiac Vibe GT, part # C12221 and one trailer hitch for a 2004 Pontiac Vibe NON-GT, part # C12234 while the Draw-Tite # 24812 will fit both models. The Draw-Tite hitch is a Class I hitch which requires the use of Class I accessories so my recommendation is to go with the option from Curt, with the right hitch depending on if you have a GT or not. Both the Curt Trailer Hitch # C12221 (GT models) and # C12234 (non-GT...
    view full answer...
  • Hitch Recommendation for an All-Wheel-Drive 2003 Pontiac Vibe
    The Draw-Tite Trailer Hitch # 24812 that you referenced is confirmed to fit all models of the 2003 Pontiac Vibe so it should work very well for you. I attached an install video and instructions for you to check out also. To complete your towing setup you may be interested in the following items: Trailer wiring # 118458 (install video attached) Ball Mount # 3593 1-7/8 inch ball # 19256 2 inch ball # 19258
    view full answer...
  • How To Install The T-One Vehicle Wiring Harness On A 2005 Pontiac Vibe
    The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 118458 does not replace any of the connectors on the vehicle rather T's into them. There are two connectors that you will be connecting to on the back of the taillight housing. One is a 3 prong and one is a 2 prong. You will need to be sure you are attaching the correct pigtail from the harness to the connector on the tail light. For example, 3 prong from vehicle to 3 prong from wiring harness etc. We have a video...
    view full answer...
  • Correct Towing Capacity of Curt Hitch for 2004 Pontiac Vibe
    The correct capacity for Curt hitch # C12234 is 2000 lbs towing and 200 lbs tongue weight. I took a look at the owner's manual and it states that your 2004 Pontiac Vibe has a maximum towing capacity of 1,500 lbs, which is the weight you would need to go by. That hitch does come with a drawbar and pin and clip, though if you are looking to tow you will also need a 4-flat connector, which you can add with T-One Vehicle Wiring Harness # 118458. For a 1-7/8" hitch ball you would need # A-80...
    view full answer...
  • Installation of Tekonsha T-One Wiring Harness On 2006 Pontiac Vibe
    On the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118458 confirmed to fit your 2006 Pontiac Vibe, The green connection side should be 2 pin, the yellow connection side should be 2 pin, and the red/black/white should be 3 pin. I've attached an installation video on a 2006 Pontiac Vibe to help. The yellow harness and the red/black/white harness with connect to the driver's side and the green will connect to the passenger side.
    view full answer...
  • Difference Between Available Trailer Wiring Harnesses for 2004 Pontiac Vibe
    The powered converter on the Hopkins Plug-In Simple Vehicle Wiring Harness # HM11141425 and the Curt T-Connector # 55057 will require a direct connection to the vehicle battery to power the trailer lights. This will essentially protect the vehicle wiring and electrical system from damage. Because these harnesses use a powered converter, it will have a higher amperage rating when compared to alternatives that have a standard converter. With this in mind, if you only plan on towing a trailer...
    view full answer...
  • Towing a Trailer with Separate Brake Lights and Turn Signals with a 2005 Pontiac Vibe with 4-Way
    It sounds like the trailer has separate turn signal and brake light circuits. This is not common on trailers in the US. Trailer wiring for vehicles also have combined turn signal and brake light circuits so that is one problem. You will need to install a converter, # 118158, to separate out the signals. You will replace the 6-Way on the trailer with a 4-Way trailer end, # HM48110. Then you would hardwire its wires to the input side of the converter; green to green, yellow to yellow,...
    view full answer...
  • Is The T-One Vehicle Wiring Harness # 118458 Compatible With LED Tail Lights?
    Yes, the T-One Vehicle Wiring Harness # 118458 is compatible with LED tail lights.
    view full answer...
  • Parts Needed to Tow Small Trailer with 2007 Pontiac Vibe
    For lighter duty vehicles like your 2007 Pontiac Vibe there are only 1-1/4 inch hitches available as the 2 inch hitch size is for larger vehicles that need additional capacity. So best option we have is a hitch in this size like the Draw Tite part # 24812. The recommended ball mount is then the # 3593 which has a rise of 2-1/8 inches. For a 2 inch ball you'd then need the part # 19258. You'll also need trailer wiring to control the trailer lights which for that you'd want the Tekonsha...
    view full answer...
  • Does the Heat Shield on a 2007 Pontiac Vibe have to be Trimmed to Install a Trailer Hitch
    The only note in the actual instructions for Curt Trailer Hitch, # 12234, are for a different vehicle on which this hitch also fits. However, we have found that it is possible that the heat shield in question will need to be trimmed using aviator shears. Heat shields are thin pieces of metal that help to dissipate heat from the exhaust. Trimming a portion will not negatively affect the performance of the vehicle and the process is actually very easy. I have included a link to the installation...
    view full answer...
  • Trailer Hitch Receiver and Wiring Required to Carry a 64LB E-Bike With a 2005 Pontiac Vibe.
    It is possible to use a bike rack like the Thule EasyFold XT # TH903202 as it is rated to carry bikes up to 65lbs and will work with a class I or class II receiver on your 2005 Pontiac Vibe. The rack itself will weigh 45lbs giving you 109lbs total for the bike and carrier weight. This would allow for you to carry a second bike if needed. The EasyFold also includes an aluminum ramp to assist with loading and unloading the bike. If you use the Curt Trailer Hitch Receiver # C12234 on your...
    view full answer...
  • Trailer Wiring Options for a 2005 Pontiac Vibe GT
    There are 2 possible trailer wiring options for your 2005 Pontiac Vibe GT. The Tow Ready Custom Fit Vehicle Wiring, # 118458, that you have referenced would be the easiest to install. It has 3 sets of connectors and a ground wire. The 3 sets of connectors simply plug in line with your vehicle tail lights. The ground wire gets connected to a bare metal surface or existing ground point. To get access to the connection points, you will need to remove the rear cargo area floor panel (as if...
    view full answer...
  • Does Tow Ready Custom Vehicle Wiring # 118458 Require a Battery Connection, 2003 Pontiac Vibe GT
    The Tow Ready Custom Fit Vehicle Wiring, # 118458, does not require a direct connection to the battery when installing and can be used on your 2003 Pontiac Vibe GT. However, the benefit of a system that does include a direct connection to the battery, like Curt Custom Fit Vehicle Wiring, # 55057, is that it protects your vehicles sensitive wiring from too much amperage draw from the trailer lights, which could damage the electrical system on your 2003 Pontiac Vibe GT. The fuse protected...
    view full answer...
  • Hitch and T-Connector Wiring Recommendation for a 2004 Pontiac Vibe
    The Draw-Tite trailer hitch that will fit your 2004 Pontiac Vibe is # 24812. The T-one Flat Trailer Wiring for your vehicle is the Tow Ready # 118458. If you need a ball, I recommend either the Tow Ready # 19256 for a 1-7/8 inch or # 19258 for a 2 inch ball. I have attached brief installation videos as well as installation instructions for both products. The video is on a 2005 Vibe.
    view full answer...

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

Info for this part was:

Employee Zack K
Video Edited:
Zack K
Employee Dustin K
Video Edited:
Dustin K
Employee Robert G
Expert Research:
Robert G
Employee Michael H
Expert Research:
Michael H
Employee Joshua S
Video by:
Joshua S
Employee Nicholas E
Test Fit:
Nicholas E
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 Cole B
Installed by:
Cole B

At 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.