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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. 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.
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Speaker 1: Today, we're going to take a look at the T1 vehicle wiring harness with the four-way flat trailer connector. Now, this is a custom-fit part. It is designed to fit 2005 to 2014 Ford Lincoln, Mercury, and Mazda vehicles. It fits many vehicles in those brands, so what I would recommend for you to do is go to our website, use our fit guide, put in your year and model vehicle, and it'll show you if this will work for your application. Now, this provides this four-way flat trailer connector at the back of your vehicle to power your trailer's signal lights. It is compatible with five-pole, six-pole, and seven-pole adapters, that we do sell separately on our website.This harness does connect very quickly and easily.
Basically, you just locate your connection points, which will be behind the tail lights. Plug in these T connectors, one on each side of the vehicle. Ground your white wire, and then your black power wire here will run to your vehicle's battery. This harness includes this black box, which is a modulite. This is to ensure that your vehicle's wiring will match that of your trailer.
It is a power module, so it connects directly to the battery to avoid overloading your vehicle's electrical system. The wire that runs out the back that the four-way's connected to, it's constructed of a 16-gauge bonded wire. If you notice, has this integrated dust cover for your four-way. What's nice about that is when you're not plugged into your trailer, you can put that over the terminals to protect it from the elements or from any damage.A few specs on this harness. The maximum amperage is ...
on the stop and turn light circuits is 4.2 amps per circuit. On the tail lights is 7.5 amps per circuit. This part includes everything laid out here on the table, even has a nice set of detailed instructions that describe how to install it, with pictures of where your connections are to be made. Basically, just to go through this briefly how this connects, what you'll want to do again is go to the back of the vehicle. Locate your connection points, which will be behind the tail lights.
You'll want to start on the passenger side and take this T connector, it has the green wire in it, unplug your harness from the tail lights, plug this in between the harness and the tail lights. Then what you want to do is take the other T connector, that has the yellow wire in it, that's for the driver side. Run that over to the driver side, same way. Plug in this T connector between the harness and the tail lights.Now, your modulite box here, you do want to attach that to a good, flat surface so it doesn't bounce around. They do include a bracket with a hole in it that you could put a screw in. They also include a piece of double-face tape that you can use to hold it into place, but you do want to attach that down. Once that's all attached, you'll take your white wire that has the eyelet on it, that needs to connect to a good clean ground. Then the remaining wire is your black power wire. That'll run to the front of the vehicle, to the battery. To do that, they give you a length of wire and some connectors. You'll take on of your butt connectors, put on the power wire, connect it to one end of this length of wire, run this all the way to the front. When you get to the front, you don't want to connect this directly to the battery. You want to run it through this in-line fuse holder.Take the other butt connector, attach it to one end of the fuse holder, just like that. Your other end of the fuse holder, you'll take this eyelet connector, attach that, and this is what'll connect to the vehicle's battery. Once that's connected, pop open your fuse holder. Take your included 15-amp fuse and go ahead and just install it into your fuse holder. Oops. There you go, just like that. Once you get it all installed, just go ahead and put your cover over that. Once you get that all attached, you'll be all ready to go. Now, they do include some extra cable ties to take up any length in the wiring. They even include this extra grounding screw if you need to make your own ground, if there wasn't one nearby, you can make your own ground with that screw. That should do it for the review on the T1 vehicle wiring harness with the four-way flat trailer connector.
Average Customer Rating: 4.8 out of 5 stars (460 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.This is a great company. Got my shipment way sooner than expected... 673329
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
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
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 - 09/23/2018This 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
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 - 08/20/2019I 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 - 06/18/2016Installation 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
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
This 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
I salvaged a hitch off of a vehicle of mine but noticed that the vehicle wiring has changed quite a bit so buying this kit was the most logical way to proceed. The two things that I appreciate the most are that the kit is complete, I didn't have to go buy more parts to do the installation, and etrailer provided a video showing the path that their installer chose for running the hot wire from the back of the van to the front power source. This is important because there is only 20' of wire for a 16' long vehicle and I didn't want to have to go buy more wire. Ultimately, I will add a 7 pole female adapter and trailer brakes and etrailer has a 7 pole adapter that will make that easy. 575158
I 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
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 - 02/04/2015Right 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 - 06/18/2018As was advertised, everything is included. Only took about an hour to install, most of that running the power wire to the battery under the vehicle. The kit works like a charm. No need to different flasher units, etc. The lights on my trailer are working great. Every time I've ordered from etrailer.com the service has been quick and accurate. I want to thank them so much for the videos they provide for mounting about everything they sell. 801272
The hitch and wiring harness work great. Installation was straightforward and I’ve had no issues. 799300
I learned about this product from watching your online video. Wanting to minimize splicing into the factory wiring on my vehicle, this was just what I needed. Just like in the video, it was easy to install. Thanks so much. 796555
Good product, excellent quality and customer service, totally recommend it 794619
The wiring kit for my Escape has worked flawlessly. The customer service from Karen at etrailer has been a delight. Thank you very much! 793499
I’ve had the harness for about a year now and I am very pleased with the results. No more trying to figure out my wiring on my vehicle because the wiring harness fixed the problem for me. Thanks “etrailer” for a great product. Charles 792344
Already have it hooked up and it looks great but havnt used it yet. But I'm sure it will do fantastic. 783464
The product had clear and concise directions allowing me to install the product in a timely manner. It worked as expected and would recommend for anyone DIY’ing. 779663
Easy,simple installation. Works wonderful. Thanks 776417
High quality and easy install. 773508
Instructions were a little backwards but easy to figure out. Works perfectly 773444
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