To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
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. Powered ModuLite reduces strain on wiring system.
Features:
Specs:
Installation
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 tail lights. You will have to remove the tail light assemblies to access this harness.
Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery and insert the provided fuse.
Once installation is complete, the 4-way flat connector will be stowed either within your rear cargo area or beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure if you are mounting it near the hitch.
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.
A ModuLite power module is built into this T-One connector. 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.
California residents: click here
Average Customer Rating: 4.8 out of 5 stars (480 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. Powered ModuLite reduces strain on wiring system.I purchased this wiring kit along with a trailer hitch and have to say this wiring kit and instructions were real nice. High quality product that went on easily. Took about an hour to install and test. Worked wonderfully and the cost was real competitive. I would highly recommend this product and eTrailer.com for your trailer hitch needs. Great company to deal with from ordering on line to follow-up after the sale, just a great company to work with. 202262
Van J - 06/18/2016This is a great company. Got my shipment way sooner than expected... 673329
My installer explained that this wiring package is a bit involved, but after looking at the online tutorial, he certainly should not have any trouble. 435830
Tony E - 09/23/2018Installation was easy and we will see how long it works. I hope it lasts longer than the Curt kit that I ordered two years ago. 704268
I was a bit hesitant when it came to ordering the special harness for the Escape equipped with backup sensors (3x the price of the basic one & 3x the work to install), but it was pretty much confirmed: the non-towing equipped harness isn't designed to handle the extra load of trailer lights - so this kit gets it power from a beefy lead connected directly to the battery. I have to say that crawling under the car, running this power lead from the d/s taillight to the battery was the biggest pain of the whole job - including installing the receiver, but I didn't have a choice. etrailer's how-to video proved to be invaluable and a time-saver. Seeing the actual installation on my specific vehicle was huge. I used the video as the manual and read the manufacturers directions as backup. Kudos to etrailer for putting together these videos and learning about the products that they sell. Kind of like the Crutchfield of trailers, only better. On another note, I inquired about shipping time and received a prompt email reply with a note about etrailer making sure that my receiver and harness would be shipped a.s.a.p. - which it was. 93210
JPTL - 02/04/2015
I have had this setup for about a year on my Ford Escape. It was super easy to setup and it is super reliable. I’m usually using a trailer every other week and it has not failed me. 10/10 571054
This is a five star review. This product was exemplary. A couple minor criticism. The batter terminal connector was not shrink. The 4-wire connector could be a bit longer. It was long enough. If you find someone who really likes to wire it to perfection it is just barely long enough. It does clip over the chain area as depicted. I think they made the power wire longer, from the looks of it compared to the videos, but it's still not quite long enough for perfectionist wiring in a bus frame. It probably isn't long enough at all. We used about 4.5 feet more. Finally, the gauge of the power line is not detailed in the product description it is 12 gauge. Do not purchase 16 gauge wire for this application, lol. 406443
Exact fitment of the harness to the lights and the installation was easy. The etrailer.com video was an excellent tool to use as it clarified certain steps in the provided paper instructions......Thanks etrailer.com. The T-one harness is just the opposite wiring set-up of the harness that is used in the video. I was able to use an existing floor body grommet plug to feed the black 12 gauge hot lead wire under the car(I drilled a 9/64th hole in the rubber grommet plug and feed the wire through the drilled hole). Running the hot lead wire to the front of the vehicle took some time (recommend ramps for better clearance). Hook-up of the fuse line and battery connection was elemental. All parts provided make the installation process very easy. The T-one harness is powering the trailer lights perfectly. 553990
Very easy to install on my 2009 Mercury Mariner. Everything required was included. The only "difficult" part was running the wire from the rear of the car to the positive terminal of the battery. The wire was plenty long enough and more than enough wire ties were included for the job. I took the rear bumper off which made running the wires between the rear lights and the module much easier. 555063
John K - 08/20/2019This wiring harness fit my 2010 Ford Escape (which had no OEM towing package nor wiring) exactly, and although the paper instructions were a bit confusing, the installation video from e-trailer was all I needed to understand how to install it. The only part of the installation that I would NOT recommend is running the long battery wire underneath the vehicle on the outside of the body, as that risks getting damaged. I wanted to run the wire on the interior, so I removed the interior trim on the driver's side and routed the wiring along the OEM vehicle wiring, using cable ties to attach it at several points throughout. The only part I had to get creative with was getting the wire through the body into the engine compartment. For that I found a rigid straw and inserted it through the rubber plug where the main wiring enters the compartment, then ran the wire through the straw. Once the wire was in the engine compartment, I removed the straw and voila! Interior-wired power to the towing harness. Also, I found that it was possible to run the green wire (from the left taillight to the right taillight) along the interior of the vehicle by routing it through the same holes the regular wiring exits the vehicle to the taillight assembly. Overall I am very happy with this product and it is definitely worth the investment to get proper trailer wiring. 693534
You will need a hour to install the wiring kit. The kit only includes a very few of the teeniest wire ties that exist on earth. I would expect that the teeny wire ties would break in a short amount of time. In reality, you will need at least 30 heavier and longer wire ties to neatly tie off all sags of the main wire from the engine compartment back to the hitch, then along the hitch itself. Be sure to tie off that square wire junction box in case the double sided tape fails. I stuck mine on the far left side of hitch. The instructions failed to say that all wiring splices should be wrapped with electrical tape or shrink tubing. 140121
Right turn signal isn't coming out of the black box of the trailer wire harness. The signal is reaching the black box. Appears the black box is the problem. This happened after approx. 9 months from installation. Used the vehicle to tow a trailer around 30 trips. Not happy about that. Installation was easy and the directions were helpful. Overall I would be extremely satisfied if I didn't have the turn signal issue. 523093
Mike L - 06/18/2018I am new to car mod-ing and are very inexperienced when it comes to knowing exactly what product to get. This is where etrailer was pretty helpful. The videos are very helpful. The hitch was made to fit my specific vehicle (2011 Ford Escape). I also purchased the specific wiring the site said I needed due to having backup sensors on my vehicle. However, after successfully installing the hitch, we realized there was a problem with the wiring. The yellow/black wires are meant for the driver's side taillights while the green is meant for the passenger. I'm not sure if I was sent the wrong product or if there was a manufacturing error, but the lengths of wire for each were switched. The shorter length wires should have been the yellow and black while the long should have been green - instead, they were the opposite, as you can see in the pictures. The black box on the right is meant to be housed in the driver side light assembly, not the passenger. Because of this, I was forced to find a long white wire, fuse it with the ground wire that was supplied, and run it back across the width of my vehicle to the factory ground. While it seems like this won't be an issue, it was very annoying having to alleviate this problem. Everything else seemed to be correct with the wiring and included items, but I would recommend that everyone inspect your order and watch all videos to make sure your product looks to be correct before attempting to install it. 420128
First class 898787
895113
892594
It was exactly as they said easy to install if you follow the directions. Works great. Thank you 880347
This wiring harness worked great to solve a big problem...my vehicle did not have a factory installed tow system and did not contain any of the relays or sockets necessary to make a "for your vehicle" wiring kit work. Installation was relatively easy and all parts were supplied in the kit. 877038
Very easy to install. Watch the helpful install videos and its a snap. 873959
Easy to install. The fact that the box has to fit behind the tail light was a little awkward. At one point my tail light stopped working until I removed and reinstalled the housing. Apparently the extra items were pressing against the harness, and simply moving the placement of the items alleviated the problem. Has worked great since. 871803
863968
Not a fan,bad pictures.Idont understand why it couldn't have an easier way for power. 863365
861039
Simple hook up and only one call to etrailer to answer one question. Works wonderful. 859133
Great product! Easy installation. Fast shipping as well. 853150
Do you have a question about this Custom Fit Vehicle Wiring?
Info for this part was:
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.
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.