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 # 118427
Our Price: $37.50
You Save: 47%
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.

Shipping Weight: 0.73 lbs
Add to cart
In Stock
Custom Fit Vehicle Wiring 118427 - Custom Fit - Tekonsha
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 118427 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 (386)
  • Q & A (0)
  • Photos

Tekonsha Custom Fit Vehicle Wiring - 118427

  • 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 point in rear cargo area
    • Plug in 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


T-One Connection Location Points

This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located behind the driver's-side interior trim panel 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 plug 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.

118427 Tow Ready T-1 T-Connector - 4 Wire

Installation Details 118427 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 - 118427

Average Customer Rating:  4.9 out of 5 stars   (386 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.


I bought and installed this when I installed my hitch. In my CR-V, the wiring was present in the cargo area, behind the left side panel, so all I had to do was plug it in. HOwever, since I use my hitch only for a bike rack, and I don't have a trailer, I've never actually tested this wiring harness.


The most difficult part of installing this product was cleaning the threads to run the screws in. Once that was done the hitch was only minutes till it was installed. Great product!!!!



Every thing went together easy and works well.

2011 Honda CR-V

Great product and fast shipping. No damage to the box and very easy instructions. I even watched the videos a few times. I had no issues except the box did not contain the hex nuts needed for the U bolt. Called customer service and it was taken care of right away. I was so excited to install, I went to local auto shop and purshcaed the correct nuts. I do wish it came with a wire brush to clean the holes the bolts went in but picked up a set. Works great and looks great on my CR-V. I would recommend and buy from again. Great job etrailer. Great product and great prices. I never have to borrow A truck again to haul.

Jonathan R.


I love my products. They still work great and look great! I use it at least 3 times a week. Holding up strong.

2011 Honda CR-V

I just installed the hitch and wiring harness this morning. It went in
without too much difficulty. The only change I would make to the installation instructions would be to improve removing and reinstalling the muffler rubber isolator hangers. The outside isolator is straight forward just remove isolator from muffler pin let isolator connected to the frame pin. The inside isolator pin I had to remove from the frame
pin first. I could not get it off the muffler pin until the muffler was dropped down then I could remove the isolator hanger from the muffler pin. Note, install the inside muffler isolator hanger back onto the frame pin before bolting the hitch in place. Just not enough room to get the inside isolator back on the frame pin after the hitch is installed. The spacing between the hitch cutout and the frame pin is too close to get the isolator back on the frame pin. See the two photos I have attached below.


Just what I needed.

Had to chase
the treads with a tap. Wire brushing just wasn't adequate. Great job on your website and the videos on the electrical hookup hardware was very helpful. I actually purchased a different one than i had in the shopping cart after watching the video.



My Honda CR-V was wired for this kit to be added, and it went in perfectly. So nice to be able to add a trailer (or rent a unit) with the connection being so compatible with the factory pigtail connector.



This high quality wiring kit is working perfectly.


Kind of a hassle to install since you have to run a wire from the rear to the front of the vehicle, but it wasn't difficult at all. Just follow the instructions/video and you'll have no issues. I used more zip ties than provided, as I don't like to have loose wires under the car.


Very satisfied


Thanks. Installed just the way instructions showed


Easy to install, and after many uses, I have had no issues!

2010 Honda CR-V

After purchasing this hitch and wiring kit for a 2010 Honda CRV I was pleased to receive the follow-up, informing me that the order had been processed and shipped.
This vendor's customer service is the best I've had the pleasure to experience for any online purchase!
Shipping was followed up and very informative also. It arrived on time and intact via UPS!
The online install information and video was right on the money. This had to be the easiest of any hitch and wire kit I have ever installed, and I have probably designed, built, or modified 20-30 hitches in my many years of custom car and motorcycle building, racing, R/V-ing, towing and farming!
I look forward to doing business again soon .
Thanks!! ......Frank Lyons

Frank L.


After owning this hitch for more than 1 year and having used it to tow small trailers and a couple of personal water craft for many mile I have to say this is a quality hitch and electrical set-up! Thanks again for the excellent customer service!! ...Frank Lyons


The wiring harness arrived in a timely manner, fit perfectly and was easy to install due to excellent instructions and the video I watched before I even ordered it. Some folks think it's silly that the wiring runs out the CR-V rear door opening during use, but I use a trailer so infrequently (a few times a year) that it is more important to me that the wiring is out of the elements when not in use. I prefer this type of hookup because I've seen what salty winter roads do to external trailer wiring. This setup will be better for my use.



The wiring harness has fully met my expectations after a year of use. Ive only used it a few times and it has worked well each time. I still like that the wiring stays inside the vehicle when Im not pulling a trailer. The 4-pin connector still looks like new because its protected inside the vehicle.

2007 Honda CR-V

the wiring was very easy to install the informational video on how to install it was very accurate the wiring was good quality and I plugged it in and it worked had no issues with lights not working or anything this product was amazing I would totally recommend and their products just off of what I've used for my CRV I'll definitely be using them again for my trailer hitch and wiring needs

Matt R.


Its been a year its still working great no problems


Well I pulled the largest u haul trailer from MI to FL and even over the mountains of TN no issue at all. Had 2 Yamaha scooters in the cargo. Did all that with a 2008 Honda CRV and the trailer hitch.

I had a garage install it for me. Anyway very happy with versatility I now have.

2010 Honda CR-V

I bought this for a 2010 Honda CR-V. Installation was straightforward - pop a few trim clips, unscrew a few screws and plug into the connector, which was right where they said it should be. All functions worked properly with a voltmeter test. The wire to the connector is just barely long enough to reach the end of the hitch receiver. Six more inches would go a long way to making this ideal.



Everything is still working great one year later.



Thanks for the followup. Everything is still working fine.

2010 Honda CR-V

Perfect easy to intall plug and play


My CRV wiring harness arrived on time to the promise date and performed as specified. The online video was helpful and gave me confidence that I would be able to install it myself before purchasing it. It installed pretty easily but some patience was needed for pulling open the plastic panels in the car. I like having the connector stored in the spare tire well.

Jim C.


The harness has been very convenient to use. A good investment. Thanks!


Very pleased.



Still working great.


I have had no issues with the wiring harness. The video you provide for installation was very concise and easy to follow. I am very pleased with the product and your support.


Timely delivery (as usual from etrailer) and simple successful installation.

My 2011 Honda CR-V didn't exactly match the video provided, but it was thorough enough that I could extrapolate ... total time *maybe* an hour -- I'm no mechanic, just reasonably handy.

Can wholeheartedly recommend etrailer and am quite happy with the wiring harness adapter for safely towing my utility trailer.


Everything was easy to install. Video makes it easy to understand assembly.

2011 Honda CR-V

The product was exactly what was described. I installed it on my 2011 Honda CR-V in less than 1 hr. No issues and no problems. I used it the next day to trailer home a log splitter I rented from Home Depot. Considering what "Professional" installation would have cost me this was a great deal. The installation video was a great help.

George N.


Although it is still installed, I havent used the product again. So, no complaints.


Plug and play, easy to install.


Love it...No problems at all..I have towed a u-haul 12x6 trailer at least a dozen times with my 2008 Honda CRV


I purchased the trailer wiring harness for a Honda CRV. It was delivered as told and easy to install. Just plug in to existing plug in car. Works great and saved a lot of money.
Thank you

Greg P.


no problem

Show More Reviews

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

  • Wiring Harness Needed for a 2008 Honda CR-V
    The wiring harness for your 2008 Honda CR-V is the T-One Vehicle Wiring Harness with 4 Pole Trailer Connector, item # 118427. This harness plugs in behind the interior trim panel in the cargo area on the driver side and has a circuit protected taillight converter to combine the vehicle separate turn and brake light circuits. I have provided a link to instructions for you to review.
    view full answer...
  • Recommended Plug-In Wiring Harness With 4-Way Connector For 2011 Honda CR-V
    We do have a simple plug-in wiring harness with a 4-way trailer connector that is designed to fit your 2011 CR-V. I recommend the Tow Ready Wiring Harness, part # 118427. This harness simply plugs into the vehicle wiring in the rear cargo area behind the trim panel on the driver side. You simply plug in the connector, attach the white ground wire to a clean metal surface, attach the included converter, and you are good to go. I was unable to find the part number you referenced. I have...
    view full answer...
  • Installation Instructions for T- Connector Trailer Harness on a Honda CRV
    The connection point is located behind the interior trim panel in the cargo area on the driver side. The 4-pole trailer connector will be stowed inside the cargo area of the vehicle. You will need to open the rear door of the vehicle and temporarily remove the rear threshold, cargo net and cargo cover to allow access of the rear interior trim panel on the driver side (it may be helpful to fold rear seat forward). Carefully pull back the interior trim panel on driver side. Then locate the...
    view full answer...
  • Which Trailer Wiring Kit is Best for 2007 Honda CR-V
    The best trailer wiring kit we offer for your vehicle is the Tekonsha kit part # 118427 as it installs the easiest and comes with the most reliable converter box. A wire does not need to get ran to the vehicle battery either. I wish we knew what the part number of just the Honda connector you'd need is but that's not something we can get. For your 2007 Honda CR-V we do not have a 7-way wiring kit that is plug and play.
    view full answer...
  • Where is the Trailer Harness Connector Located on a 2007 Honda CRV in Guatemala
    It is possible that a Honda CRV sold in Guatemala will have different wiring, but I am not familiar with vehicles sold outside of the U.S. and Canada. What I can do is tell you where the connector should be located, whether or not it is there could be dependent on where the vehicle was sold. The connector is behind the access panel on the left side of the vehicle. I have included a link to a video of an installation of this part in a 2008 CRV so you can see how he did it.
    view full answer...
  • What Is Needed To Install The Tow Ready T-One Wiring Harness # 118427 On A 2010 Honda CR-V
    The Tow Ready T-One Wiring Harness, # 118427, will plug into the white trailer tow plug on your 2010 Honda CR-V, located behind the drivers side rear interior trim panel. You will also need to attach the white ground wire on the wiring harness to the vehicles existing ground stud or another suitable grounding point. You will not have to do anything with the fuses under the hood of your 2010 Honda CR-V. That will be all that is needed to install the Tow Ready wiring harness to your vehicle....
    view full answer...
  • Troubleshooting Trailer Taillights that Don't Function Correctly When Headlights are On
    It sounds like the problem is in the ground circuit. Any time we have seen taillight circuits stop working when headlights get turned on we know the problem is the ground circuit. Since your ground wire got ripped off at one point I would make sure it is reconnected well. And you should make sure your taillight assemblies are grounded well to a clean metal surface. Some assemblies ground through the mounting hardware so you would want to make sure they are installed onto a clean metal...
    view full answer...
  • Trailer Wiring Harness Recommendation for a 2010 Honda CR-V With Tow Daddy Tow Bar Wiring
    The Tow Daddy flat towing harness you have installed on your 2010 Honda CR-V wouldn't interfere with the trailer wiring harness part # 118427 that is recommended for your vehicle. The two use different installation ports on your vehicle so they would work just fine. The Tow Daddy would plug inline with your taillights and the # 118427 plugs into the taillight wiring port of your vehicle. See the install video I attached.
    view full answer...
  • Troubleshooting Trailer Light Malfunctions on a 2009 Honda CR-V
    From what I understand, at first, none of the lights worked. Now, with a trailer connected and the running lights on, you get a hot signal with every connection. First, you will have to disconnect the trailer to do some testing. Start by using a circuit tester to test the wires going in to the converter. Test each function separately. Turn signals, tail lights and stop lights. If these are all correct, move on to the wires coming out of the converter. Test each function again for these...
    view full answer...
  • Are there Locking Tabs on the Trailer Wiring Harness Connector for a 2007 Honda CR-V
    There are at least 3 locking tabs on the connector on the trailer wiring harness # 118427. I have included a picture that shows them. You may need a small flat head screwdriver to pry and release the tabs so you can unplug the old connector.
    view full answer...
    Image 1 for
  • Towing Capacity, Trailer Hitch and Wiring for 2011 Honda CR-V
    The Curt Trailer Hitch Receiver # 13555 that fits your 2011 Honda CR-V has a capacity of 3,500 lbs, so yes, the hitch can certainly handle a 2,500 lb camper. However, I looked in the online version of your CR-V's owner's manual and it has a maximum towing capacity of 1,500 lbs so you would need to stay under that weight. If you do plan on towing, then for a trailer wiring harness you would need the T-One Vehicle Wiring Harness # 118427. I have added links to video installs on a 2011 CR-V...
    view full answer...
  • Can a 2007 Honda CR-V Tow a 15 Foot Bass Boat Trailer
    A weight distribution system is a device that is installed on a trailer and uses leverage to transfer the weight of the load across the entire towing setup. It's in addition to a trailer hitch and is optional for towing, although sometimes highly recommended. The trailer hitch receivers designed for your 2007 Honda CR-V are not rated with a weight distribution system, therefore you don't have the option of using one. But you can still tow a trailer. I recommend the Draw-Tite # 75547...
    view full answer...
  • Recommended Trailer Hitch and Trailer Wiring Harness for 2007 Honda CR-V.
    The trailer hitch I recommend for your 2007 Honda CR-V is the Curt Class III Round Tube Trailer Receiver Hitch # 13555. With a 2 inch hitch receiver, this trailer hitch will accept a wide variety of hitch accessories and ball mounts. This trailer hitch has a bolt-on installation that requires not welding or drilling. You will want to check your owner's manual for the towing capacity of your CR-V. Based on my research, the 2007 CR-V has a towing capacity of 1,500 pounds. I have attached...
    view full answer...
  • Ground Clearance of Curt Trailer Hitch Receiver on 2011 Honda CR-V
    When we installed the Curt Trailer Hitch Receiver # 13555 on a 2011 Honda CR-V, we found it has a height of 15-3/4 inches from the top of the receiver to the ground. This is part of the formula you will use to find the correct ball mount, with the other being the height from the trailer coupler to the ground - the difference will be the rise or drop you need (if the coupler is higher you need that amount of drop; if the receiver is higher you need that amount of rise). I've added a link...
    view full answer...
  • Tow Ready and Curt Wiring Harness Comparison for a 2011 Honda CR-V
    The Tow Ready T-One Wiring Harness, # 118427, and the Curt T-Connector Wiring Harness, # C55106, are basically the same harness from two different manufacturers. The main difference between these two harnesses is that Curt uses surface-mount technology (SMT) which is newer technology from the older through-hole technology. The Curt harness also has higher amp ratings of 3 amps per circuit for the stop and turn lights and 7.5 amps per circuit for the tail lights. The Tow Ready harness...
    view full answer...
  • Does Trailer Hitch From 2000 Honda CR-V Fit 2007 Honda CR-V
    There were multiple generation changes for the CR-V between 2000 and 2007, so a hitch from a 2000 Honda CR-V will not fit 2007 Honda CR-V. The correct fit for a trailer hitch receiver for a 2007 Honda CR-V is the Curt Trailer Hitch Receiver # 13555. I also wanted to mention, in case you plan on doing some towing with your '07 CR-V, the correct 4-way wiring harness is the T-One Vehicle Wiring Harness # 118427.
    view full answer...
  • Troubleshooting Trailer Left Turn Signal and Brake Lights On 2009 Honda CR-V
    First thing you should do at this point is test the 4-way of the wiring harness with a circuit tester part # PTW2993 for voltage on all of the right pins when the taillight signals are being applied. Just like in the video I attached. If the voltage checks out there but the trailer lights still don't function right then the problem is on the trailer wiring. That would mean that problem is either due to a ground issue or a short issue. Make sure that the trailer side and vehicle side connectors...
    view full answer...
  • Towing Capacity for 2007 Honda CR-V
    I looked up the towing capacity for your 2007 Honda CR-V and it looks to be 1,500 lbs as the max capacity for the vehicle. I'm not sure if your trailer would weigh less than that but we do have everything you'd need to tow a trailer with your vehicle. For a hitch the Draw Tite # 75547 would be a great option. It has a 2 inch hitch opening and installs easily. See install video. Then for trailer wiring you'd want the T-One kit part # 118427 which is also a confirmed fit. This is our most...
    view full answer...
  • After Installing Trailer Wiring Harness on a 2011 Honda CR-V Vehicle Running Lights Stopped Working
    It does sound like it is a fuse but we need to figure out what caused the fuse to blow in the first place. Otherwise this problem will just keep happening. First, to verify that it is a fuse, you can use the owners manual and/or the legend on the power distribution box lid to find the fuse location. Leave the harness unplugged when you change the fuse. If the running lights on the 2011 CR-V start working then we know that there was a short somewhere that caused the fuse to blow. Check...
    view full answer...
  • Does the Draw-Tite Hitch 75547 For a Honda CR-V Come With a Trailer Wiring Harness
    The Draw-Tite Max-Frame Trailer Hitch Receiver part # 75547 which is a fit for your 2007 Honda CR-V does not come with a trailer wiring harness for lights. This will need to be purchased separately, I recommend the T-One Vehicle Wiring Harness part # 118427 because it is plug and play which you can see in the attached install video and it is our most reliable option we have for you. I have attached an install video for you as well of the trailer hitch. If you don't already have a ball...
    view full answer...
  • Installation of Parts to Tow a Trailer with a 2008 Honda CR-V
    We do have a couple of videos of a hitch and wiring harness being installed onto a 2008 Honda CR-V. I've linked them both to this page for you. The Curt trailer hitch receiver, part # 13555, and wiring harness, part # 118427, are both confirmed to work for you. You also might be interested in our ball mount kit, part # 989900, to complete you towing setup. I've linked our seletion of ball mounts to fit the hitch if you'd like to take a look at others that we offer. I've also attached...
    view full answer...
  • Parts Needed to Add a 7-way to a 2010 Honda CR-V
    For your 2010 Honda CR-V you will first need to start with a 4-way if you don't have one since there are no 7-way options for your vehicle. For that you will want the # 118427 if needed. Now to convert it to a 7-way all you will need is the # 37185. This will plug right into the 4-way of your CR-V and will provide you with a 4-way and a 7-way. If you permanently mount this part it would be just like having a 7-way installed.
    view full answer...
  • Hidden Hitch With 2 Inch Receiver for 2009 Honda CR-V
    We have the exact part you need, though it is just under a different name. The Draw-Tite Max-Frame # 75547 is simply the Hidden Hitch 87440 with a different name; this is a Class III, 2-inch hitch that is a confirmed fit for your 2009 Honda CR-V. It is a complete bolt-on installation that does not require any drilling into your CR-V's frame; I've added a link to a video of this hitch being installed on a '09 CR-V for you to take a look at. To add a 4-way to power your trailer's lights...
    view full answer...
  • Finding Reverse Light Circuit on 2011 Honda CR-V to Install Back-Up Camera
    The reverse lamps for a 2011 CR-V are in the taillight assemblies, not on the liftgate. You can access the wiring harnesses that feed the taillight assemblies by removing the interior panel on either side of the cargo area. Use a circuit tester like part # PTW2993 to probe the wires in the harness, as a helper puts the car in reverse with the engine off. The correct circuit should be hot, so you shouldn't have any trouble finding the correct wire. I don't have any specific information on...
    view full answer...

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

Info for this part was:

Employee Joe V
Test Fit:
Joe V
Employee Zack K
Video Edited:
Zack K
Employee Andrew K
Video Edited:
Andrew K
Employee Joshua S
Video Edited:
Joshua S
Employee Andrew L
Video Edited:
Andrew L
Employee Patrick B
Expert Research:
Patrick B
Employee Michael H
Expert Research:
Michael H
Employee Jeff D
Expert Research:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
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
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.

Product Experts Available Now!
Call 1-800-940-8924