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  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

Retail:$80.35
Our Price: $64.92
You Save: 19%
Custom Fit Vehicle Wiring

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Custom Fit Vehicle Wiring 118449 - 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. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number 118449 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.
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  • Reviews (844)
  • Q & A (0)
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  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring

  • 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. 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
  • 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: 5.6 amps per circuit
  • 1-Year limited warranty


Installation on 2014 and 2015 Toyota Highlander

2014-15 Toyota Highlander connection points

This custom-fit T-One connector plugs into your vehicle's wiring harness. The connection points for the 4-way tow harness and the ModuLite (converter) are located underneath the spare tire compartment. Once you've plugged in the ModuLite, locate the "towing fuse" position in your fuse box and insert the included 10-amp fuse.


Installation on 2013 and Earlier Toyota Highlander

This custom-fit T-One connector plugs into your vehicle's wiring harness. The connection point for the 4-way tow harness is located behind the driver's-side interior trim panel in your rear cargo area. The ModuLite plugs into the factory wiring harness beneath your dash, on the driver's side. Once you've plugged in the ModuLite, locate the "towing fuse" position in your fuse box and insert the included 10-amp fuse.


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


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.



118449 Tow Ready T-1 T-Connector - 4 Wire - Modu-Lite

Item # 118449

Installation Details 118449 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 - 118449

Average Customer Rating:  4.9 out of 5 stars   (844 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.

by:

This converter box with wire and pigtail is exactly what I needed for my factory prepped 2012 Toyota Highlander. It did not come with these wires in it. After talking to the folks are etrailer; they squared me away and I got this installed and ready to tow my boat to go fishing. It even comes with the two fuses needed. He spiked mini one for the inline fuse holder as well as the low profile 10 amp fuse for under the hood. I did cut the love off of the pigtail fuse so it would fit into the hole in the compartment in the back by the tail light. I attached my converter box to an existing bolt under the dash against the firewall. It does not weigh that much so all is good. Did not even need to use zip ties just tucked up the firm wires above others and holds well.


Comments
Works flawlessly easy install and fit up.
Gerald - 08/03/2022


by:

Very easy to install. The installation video was spot on. I cut an access hole to route the harness directly into the cubby hole.




by:

Great hitch!! Relatively easy to install and at a great savings over what you would pay at the dealership. I just pull a utility trailer and don't need electric brakes. I bought the electrical kit that allowed me to connect to the factory wiring with no cutting/splicing. I saw a Youtube video in which a fellow used a floor jack with the hitch connected with Vicegrip pliers and used that example to install by myself.

Completely satisfied with the Draw-Tite hitch and etrailer.com


Comments
Everything working fine, still completely satisfied with this purchase.
Terry C - 08/18/2020


by:
2016 Toyota Highlander

hitch and installation directions were spot on! everything fit great with no issues. shipment was quick. would buy from them again.




by:
2015 Toyota Highlander

Purchased a new to me 2015 Toyota Highlander Limited. Needed to add a tow hitch and wiring. Found this wiring kit. Installed easily and has worked perfectly for the last year now. Highly recommend.




by:

5/11/22
Ship Status: Delivered
Delivery
Date: 5/18/22
Email Date: 5/19/22
Dear Carol,
I'm writing to express my unhappiness with receiving my tow package order from etrailer.com in front of my garage door rather than the front door this morning; I almost ran into a leaning box when backing my car out of the garage. When I went closer to move the box into the garage, my unhappiness turned to disappointment. First, the tow package box was badly damaged, torn and taped shut from front and bottom, as shown in the attached pictures.
As the box was opened, some products were found to be slightly damped, such as the black canvas bag containing the trailer wiring kit box, wiring kit box had been opened as shown in one of the pictures. Also, the trailer hitch was scratched on both ends as you can see in one of the pictures.
It has been my first time ordering from etrailer.com, I am very disappointed with the product delivery. I am sure etrailer.com will stand by their pledge to the decades of experience and excellent service, and will be backed by the Satisfaction Guarantee and our Lowest Price that is claimed. I expect some sort of compensation in this regard to make up for my unpleasant experience purchasing a tow package for my Toyota Highlander from etrailer.com.
If you have any questions or require additional information, please do not hesitate to contact me.
Replacement Hardware Kit for Tow Hitched Received: Our tow hitch needed 10 bolts to install the hitch but we received 9 bolts as shown in the picture.
I am open for any suggestion for an overall rating. Yes! I am sure not to order or suggest anyone to order from ETRAILER.COM. They do not stand by their pledge to customers.




by:
2018 Toyota Highlander

These OEM products that I purchased last summer from your company, were spot on ideal. Everything was top quality and allowed myself to install a "exact factory duplicate" trailer hitch on my 2018 Highlander.




by:

First, completely bolt up hitch with no drilling required I have installed. I watched the installation video for my car and read the instructions. It was an easy job and looks nice. I also purchased the plug-and-play light wiring harness. It works well and was easy to install.




by:
Toyota Highlander

Installation could not have been easier. The video on the e-trailer website for installation in the Highlander was a great help. Even though the vehicle came with the factory tow-prep package that includes a wiring harness, the T-One harness or equivalent is still required. Go figure. As an earlier reviewer noted, with the third-row seat it is necessary to remove the driver-side flip-up third-row cover (the piece just ahead of the tool kit cover). Easy enough to do by simply laying down the rear seat and prying up the rear edge of the cover to loosen the clips. See the attached photos, the first with the cover in place, and the second with it removed. It is necessary to remove this cover to permit removal of the left-side tray to gain access to the existing harness and plug.
One other piece of advice is to thoroughly clean the surface to which the box will be mounted to assure a strong bond with the included two-sided tape. I used alcohol-soaked gauze.
The price through e-trailer was the best I could find anywhere, and the service was second-to-none!




by:
2016 Toyota Highlander

To say that the instructions were perfect and the installation was 5 times easier than I thought would still be an understatement. Very easy installation in a 2016 Highlander; anyone with basic skills can do this with professional results. 30 minutes job if you are slow like me.

The only tools you will need are a 10mm wrench or socket, and an auto trim removal tool for popping up the carpet from the rear tray. No wires to cut, or splicing; very clean plugs to connect with built-in plugs already in Highlander. Too easy!




by:
2014 Toyota Highlander

Installed for a customer, fits very cleanly, looks like a factory part. Wiring worked perfectly you will definitely be my go to place for trailer hitches and accessories.




by:

Very easy to install. Instructions for exact fit procedures were spot on. The only thing I did not like, there was no indication to trim the interior panel to keep from pinching the harness between the sill panel and the cargo storage container.


Comments
You mention in your review that you were unable to find a way to keep the wiring harness from pinching between the side panel and cargo container. I have a video linked below, if you go to the time stamp 3:09, our installer shows the best way to line the harness in the paneling in order to keep the wiring from smashing.
-- Etrailer Expert Katrina B - 03/22/2022


by:

It's looks like made of high quality material! Highly recommended.




by:

Install on the hitch was pretty easy, did it myself with the help of a floor jack. The wiring was straight forward and basically plug and play. Quick shipping.




by:

2011 HL, bought OEM hitch and this wiring harness. Pre-wired under dash was just a direct plug-in. Not sure the double sided tape will hold. Getting the plastic tray out of back was a little difficult. Easy plug-in once I got it out. Decided to just leave the plug and wires in the storage bin but could not find a way to route it into the black storage bin without creating a larger hole. I used a Dremel and expanded one hole (see picture). Probably an easier way.




by:

This included everything I needed to install, price was very competitive, and installation was a snap. It was also delivered quicker than anticipated. I would buy from etrailer again in a heartbeat.




by:
2013 Toyota Highlander

The hitch was a perfect fit. I also put the drivers side panel back in place. All it requires is a notch in the panel to fit around the hitch mount. This makes the job complete like it should be.




by:
Toyota Highlander

All of the products fit our Highlander perfectly and the instructions matched the vehicle better than average.




by:
2011 Toyota Highlander

Great product. Easy to install (2011 Highlander SE). Fit perfectly. I ran my wiring thru the rubber grommet under the left tray and then under the chassis as described in another customer's review (my pic is prior to sealing the cut with silicone). The product's instruction sheet was good but pics a bit hard to see clearly. etrailer.com's videos really helped. Disclaimer: the wire routing described is not spec'd by the mfr. in the instructions. It's only an option for you if you choose.




by:
2011 Toyota Highlander

Installed on a 2011 Toyota Highlander Base Model

Although the instructions missed some parts on my 3rd row seating model, they were very readable and the installation went quickly. I'll only point out a few things I saw that strayed from the written word, and something that I "modified" for your consideration. I hope this is not considered something that would affect safety/warranty.

Under the dash, the converter box has sticky tape. I couldn't find anything that this would stick to (it just came off once stuck), so I just zip tied it in place.

In the back, there are no instructions on how to remove the "folding cover" for the third row seat. I ended up just pulling it out, which probably wasn't the best. I got lucky, and none of the blind fasteners broke off. Once this folding cover is removed, there's a sticky "tab" that goes over the box over the trailer lighting connector. It's straight forward enough, but not explicitly mentioned.

I did not like the idea of the 4 way flat sticking out the back door. Maybe it would be okay for occasional use, but I'd rather have it under the vehicle. Plus, I use a lighted hitch cover that would not work well if the wire went out the door. Under the tray that is removed to access the trailer connector, there is a large drain/access plug in the steel floor. I removed this plug, then used a sharp utility knife to X out the center of the rubber plug. I only cut enough out to allow the vehicle connector (not the trailer connector, which is larger) to be pushed through; up from the bottom. I replaced the plug in the vehicle, then routed the wires along a factory harness to the connector. I filled the rubber plug with silicone to stop water and fumes from entering the cabin, then replaced all the interior bins and covers.

Under the car, the wiring set is just long enough to reach the hitch. Here I have it plugged into a lighted hitch cover. I keep a 4 foot 4 way flat extension in the vehicle with the draw bar for when I'm towing.

Overall, I'm very satisfied with etrailer.com and their products. Not everything goes to plan, but the products themselves are very good. The price of this DIY job was 1/3 of the cost that the dealer wanted, and I know it was done right. I will buy from them again.

(In the pic, the hitch wiring lights up my hitch cover, which I didn't buy from etrailer.com, but had from a previous vehicle).




by:
2017 Toyota Highlander

I just installed the harness so simple and the video was perfect. This is second item I ordered from etrailer and recommend them highly great service and shipping.




by:
Ford Edge

Easy install and works great. As others have said, Needs longer trailer lead to allow for routing through existing holes. It's shorter length requires it to be routed directly out side of storage bin area to reach trailer, which means it's pinched between the edge of the storage bin and door frame trim. Probably not an issue if you don't have anything heavy sitting on storage bin while towing for long distances... otherwise it should be wrapped with tape at that spot or an extension should be added to allow it to be routed through existing holes.




by:

This is the third time I have purchased a trailer hitch from etrailer in the last 8 years. Great experience each time! Very good instructions included. Plus excellent videos on YouTube! Almost forgot, the plug in light wiring kits are simple to install and work great!




by:

Very very simple install! I ran the trailer wire through the rubber Grommet so that it would be on the exterior underneath the vehicle. Then used some zip ties to secure to lower valance on the vehicle gives it a finished look.




by:

The products were as advertised, shipped and delivered promptly, and the directions were accurate and made the job easy to install. Etrailer.com is my go-to site for any hitch and trailer products!



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