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

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

Item # 118424
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Retail:$60.26
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Custom Fit Vehicle Wiring

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Custom Fit Vehicle Wiring 118424 - 4 Flat - Tekonsha
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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. Powered ModuLite reduces strain on wiring system. Call 800-298-1624 to order Tekonsha custom fit vehicle wiring part number 118424 or order online at etrailer.com. Free expert support on all Tekonsha products. Guaranteed Lowest Price and Fastest Shipping for T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (108)
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Tekonsha Custom Fit Vehicle Wiring - 118424

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • Powered 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. Powered ModuLite reduces strain on wiring system.


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 point in rear cargo area
    • Plug in connector
  • Includes ModuLite to ensure that your vehicle's wiring matches that of your trailer
    • Powered module connects directly to battery to avoid overloading vehicle's electrical system
  • 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: 4.2 amps per circuit
  • 1-Year limited warranty


Installation

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 the jack storage compartment of 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.


ModuLite Powered Tail Light Converter

A ModuLite power module 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. This power module functions as a tail light converter to combine 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.


With a ModuLite, your trailer's lights will be powered without overloading your vehicle's electrical system. Because the module draws power directly from your car's battery and bypasses the electrical routes that are used by a basic wiring harness, there is virtually no draw on your tail light circuits.



118424 Tow Ready T-1 T-Connector - 4 Wire - Modu-Lite

Installation Details 118424 Installation instructions

This Product Fits The Following Vehicles



California residents: click here



Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118424

Average Customer Rating:  4.8 out of 5 stars   (108 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. Powered ModuLite reduces strain on wiring system.

- 118424
by:
2009 Acura MDX

Installation in our 2009 MDX was a snap! The unit plugs directly into the terminal panel near the left rear corner of the cargo area, and there's plenty of room in the space below the cargo floor to mount the controller unit (I used 3M double-stick foam mounting tape if my own, as the pieces referenced in the instructions were not included). As other reviewers have noted, the white ground wire is too shot to reach the main grounding lug where grounds for everything else in the area connect to, but I found a 6mm (?) threaded boss under the surface pad just to the left of the opening for the jack, which worked perfectly for securing the ground wire. I ran the flat-4 connector thru a small slit I cut in the wide rubber grommet under the plastic shield in the jack compartment (where the OEM harness runs thru - be careful not to nick any if those wires when cutting!) and then zip tied it along the top of the hitch tube down to the bracket for the connector (be careful not to let the wiring hang down and contact the heat shield though). I re-sealed the penetration thru the slit in the grommet (interior and exterior sides) using some black silicon RTV gasket maker I had on hand, but any other silicon product would prob work as well. The whole installation was a total cakewalk, and the end result looks very professional if I do say so myself! I did chuck the cheesy mounting screws that came with the connector mounting bracket though, and used some 6mm SS machine screws w/SS lock washers and nuts that I had on hand. Had to drill out the mounting holes in the bracket but it was no issue. Sprayed it black afterwards to match all else.


Comments
A year later now and the harness and connector are still rock solid and still looks like factory-imstalled. Excellent product, def would buy again andor recommend to friends. But not enemies.
Sean H - 05/19/2020


- 118424
by:

This product is as described and performs as it should. Works excellent and looks great! I was able to install the kit in two hours, in my driveway. Customer service was exceptional as well. Thank you etrailer and Justin.



- 118424
by:
2007 Acura MDX

Product arrived on time and in perfect condition! Very EASY to install and I owe it all to watching the videos provided on the site. I had my cell phone in and under the car and watched step by step on how to install both the hitch and wiring harness. Hardest part was holding up the hitch...had to ask my wife to climb under the car with me for the extra hand! Not that its hard just awkward angles to wrench and hold at the same time. I've seen some reviews that others used a floor jack if an extra hand isn't available which I think is a great idea!



- 118424
by:

Installation was very easy with the instructions provided; the only tool I needed was a 10mm wrench and it took about 30 minutes. The video provided on the site was also very helpful. The ground wire could have been a bit longer to make it easier to put the floor liner back down without a bump, but overall I'm very happy with the connector kit.



- 118424
by:
2011 Acura MDX

Very easy to install and is looks like stock on my Acura MDX love it.



- 118424
by:

Very easy to install on my Acura MDX, one year later, no complaints. Great price, too!



- 118424
by:
2015 Acura MDX

Let's see, $40 on this wiring harness or $200+ to get it wired from factory? Financially, it made sense so I decided to try it out. The wiring was super easy and the instructions were perfect! I wired mine a bit differently so it actually goes down through the bottom of the floor panel and I zip tied it to the actual hitch so it is almost like a permanent mount. The wiring itself only took about 15 minutes. This is a great alternative to factory wiring. I used this on a 2007 acura mdx.



- 118424
by:
2018 Acura MDX

I installed the hitch on my 2013 Acura MDX the day after I received it. The video instructions on the "etrailer" website were a great help and the installation was made following the tips and suggestions included in the videos and reviews. I installed it by myself and used a bottle jack (with a block of wood) to position the hitch for mounting. I did not raise the vehicle and installed the hitch with the vehicle's tires on the ground. From start to finish, the installation time was about 2 hours (including borrowing 1/2" drive 18 mm and 22 mm sockets from a neighbor to tighten the mounting bolts). The installed hitch is unobtrusive, doesn't impact ground clearance, and looks like a "factory" installation. The product arrived when promised and was in excellent condition as delivered.



- 118424
by:
2007 Acura MDX

Pros: Plug & Play. 4-way lead is plenty long. Cons: The grounding wire is too short. Did not come with double sided tape as the instructions say it should have. For a factory looking install, the white grounding wire is too short for a 2007 Acura MDX. I removed the felt cargo tray in the back of my MDX and removed two circular rubber grommets from the sheet metal below, which allowed me to route the 4-way electrical connector out of the bottom of the car (near the spare tire) and permanently mount the trailer connector to a bracket on the hitch. I like this setup better than the instructions which say to store the 4-way lead in the cargo tray and just run it out the hatchback door when towing. The trouble is, if you want to put the ModuLite power module out of sight (aka behind/within the interior trim), the grounding wire is too short (even per the installation instructions). With the ground connected and the length of grounding wire they give you, the module would end up under the felt cargo tray after the tray is re-installed, and there's no space for it. The tray would bulge very awkwardly. I solved it by splicing in 6 additional inches of 12-14 gauge wire on the grounding line and then tucking the module into a very convenient cavity under the MDX's electric junction box on the drivers side of the car. Also, instruction step 3 says that the harness should include some double sided tape to mount the module (basically to keep it from rattling); mine didn't come with any tape. So, for needing to splice in 6 inches of grounding wire and for having to provide my own double-sided tape, I deducted one star. Other than that, install was pretty easy.



- 118424
by:

For years we have talked of exploring the US in a motor home. Class A homes are too large for us and are difficult to drive in urban settings. We decided to rent a small trailer pulled by our Acura MDX. We didn't have the slightest idea about what gear we would need to prepare our vehicle for towing. Thanks to Paula at etrailer, we were given the time to describe our plans, vehicle and the trailer we planned to rent. Paula walked us through the towing accessories needed, and made her recommendations. We followed her advice, ordered the parts and Paula stayed late before the weekend to ensure our order was shipped before she left for the day. The parts arrived in 2 days and have been installed on our vehicle with no problems. We are very pleased with etrailer.com and Paula



- 118424
by:
2012 Acura MDX

Hitch looks perfect....close to factory installed. Lines up perfectly and almost level with the exhaust. I purchased the wire harness and the mounting bracket for the 4 pole flat trailer connection. Looks great and pleased with the price/shipping.



- 118424
by:
2013 Acura MDX

I was going to have the dealership install a Trailer hitch and wiring harness on my 2013 MDX but decided to do it my self with the help of etrailer. Very quick shipping, very easy install, just as advertised. I watched the video's on the website the night before, they made the install a breeze. I saved over $600 !!! Thanks etrailer!!!



- 118424
by:

Excellent hitch that was represented accurately in the online descriptions as well as through the agent I spoke with. Fits perfectly, installed in 90 minutes, and the wiring harness was universal for easy plug-and-go on my vehicle's existing wiring. Best part is that it was a great price for great quality!



- 118424
by:

Product arrived on time but not in a perfect condition. UPS delivered it with paint chips in 3 places. Installation was as advertised. It took me approx 45 minutes to install without lifting the vehicle and doing all this alone. Installation of wiring harness took less than 5 minutes. I used the product almost immediately and it worked great. Overall happy with the product and the ease of the installation.



- 118424
by:

Called to get info on installing trailer wiring. Geoffrey was super helpful. I also got the hitch and ball and a the led tester for the lights. It all arrived in a few days and was easy as pie to install. Even included the self-tapping screw. My Acura dealer quoted me $450 for this job, even after I sent them the info on the kit and a video showing how easy it is to install.



- 118424
by:

The ground wire on this product is not long enough to reach from the suggested ground point to the side trim area, where you need to mount the black box. If you mount the black box on the floor of the cargo area, the cargo area liner would not fit back in properly. I had to use an alternate ground point, which I found way back underneath the side trim. Worked fine, just not as easy to access.



- 118424
by:

This is a replacement item that I purchased a few years ago that for some unknown reason went on the fritz. Current getting to the controller but not going thru to the wiring for the trailer. Impossible to take apart to see if fixable so bought a new one. This one works, at least so far. Use the trailer twice a year but think working lights are a good idea. Installation is much easier the second time, not very difficult the first time either. Great service in gettng me the part on etrailer.com.



- 118424
by:
2012 Acura MDX

The product can be installed as indicated in the videos; however, the 2012 MDX Advance has an additional equipment installed below the electrical connection box that makes it much harder to thread the electrical connector up to the electrical box. It can be done, but is more difficult than indicated. I suggest updating the video or providing a second video showing the advanced version.



- 118424
by:
2015 Acura MDX

Installed it in less than 15 minutes, hooked it up to the trailer and it works great. The dealer wanted to charge me close to a thousand dollars to wire my MDX.


Comments
Still going strong after one year. No issues at all.
Mike - 11/21/2014


- 118424
by:

This product has held up well, although I need the clip that holds the wire harness that fastens into the trailer hitch!



- 118424
by:
2007 Acura MDX

Just installed this over the weekend on my 2007 Acura MDX. This is very easy to install. I simply just route the cable out the back hitch door when needed. If you tow/use your hitch relatively often you should probably have a permanent mount for the cable by the hitch receiver.



- 118424
by:
2011 Acura MDX

Very easy installation. I have the Advanced Package and even with the extra box, wiring around to the plug was a breeze. This took me less than 10 minutes. I did not mount this to the exterior of the vehicle.



- 118424
by:

Received very quickly. Installation took 10 minutes. Installation instructions were excellent.


Comments
Works great. Installation was a piece of cake with you excellent online installation videos. I have since purchased a harness for a 2015 Volvo V60 and again you video made the installation very easy and quick, less than an hour.
Robert M - 11/01/2017



- 118424
by:
2011 Acura MDX

Great product, plugs right into my 2011 MDX. Only issue would be a suggestion that the ground wire be a little longer. The best spot to ground it is a little farther away from the best spot to mount the box on this particular vehicle. It results in some minor tension on the ground wire which could be a problem in the future.



- 118424
by:

I am very pleased with quality of the Curt hitch as well as the excellent fit. It was a bit tight, but this is a good thing. An extra pair of hands helped with installation. E trailer sent it out quickly and it was received within several days. Much sooner than I expected. Wiring was quick and easy to install.


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Show More Reviews

Ask the Experts about this Tekonsha Custom Fit Vehicle Wiring



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    When you are installing a T-One Vehicle Wiring Harness with 4 Pole Trailer Connector, part # 118424, you will not need to install any fuses into your 2007 Acura MDX. I have included instructions and an installation video linked below.
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  • Trailer Wiring Harness Shows No Power On 2010 Acura MDX
    When installing the Tow Ready Wiring Harness, part # 118424, and you find that you have no power to the wiring harness you probably need the relay as stated on our site under Tech tips. You will need to visit your Acura dealership to have the relay installed. They would be able to advise you concerning the best location for installation. One of our folks here said that most Acuras have the relay installed but on occasion it has not been there and requires the dealer to take care of it.
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    In most situations it is preferred to have a 4-way connector on a vehicle that stores on the inside of the vehicle as that will protect it from potential damage and from developing corrosion. The wiring harness part # 118424 is designed to store on the inside of your 2012 Acura MDX and then when you need it you would be able to open the rear door and pull the harness out so that you can attach it to your trailer. The only way you would be able to store it outside would be run it out the...
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    Image 1 for Image 2 for
  • Available 4-Pole Wiring Kits for 2012 Acura MDX and Part Needed to Convert to 7-Way
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  • Trailer Wiring and Anti-Rattle Device Recommendation for 2013 Acura MDX
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