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

by: Richard10/17/2018

It was easy to install and does just what I wanted. 575216

I installed this harness in my 2013 Outback. The plug in the Outback was difficult to find and pull out even with the fine instructions from etrailer.com, I blame Subaru for that. The only issue that I have with this harness is that once plugged in the fuse and controller module are very difficult to situate in such a way as to enable the replacement of the Subaru's interior panels. Both the fuse and controller could be placed closer to the middle of the harness enabling them to be stored in the spare tire well. I ended up shoving them under the side wheel panel with difficulty and running the rest of the wires around the left trunk perimeter and into the spare tire well. From there it was easy to remove the rear most rubber drain plug in the well and cut a slit in it for the harness (see picture) to run through before placing the plug back in its place. Longer zip ties would have been helpful for securing the harness to the hitch. 95565

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by: John W10/16/2018

2012 Subaru Forester

This harness fit my Subaru Forester 2012 perfectly. Installed just like in the video on the website illustrated. Still works fine after a year. Since it spends most of its time inside the vehicle away from the elements I've had no issues with its function - it delivers every time. The wiring on my trailer is of course another matter haha! 574788

Very well built. Kind of a pain to get at Subaru connector. Subaru could make this more accessible. 86789

Worked well.Outback wiring is a lot harder to get at than forester wiring. Cant imagine why Subaru does that?

penoby - 06/30/2014

Your video on how to install hitch and wiring was so simple to follow and easy to understand that I did not even need the instruction sheets. This video convinced me to do it myself and save money allot of money! The only problem while installing hitch I had was in enlarging the holes in my car. This was because of the material this section was made of , aluminum. or something of the kind, very soft. A die grinder would have made short work of this task. This part took the most time, about 30 min. the rest of the job was complete in another 15 min. I am speaking about the hitch, wiring took another 30 min., you will see why when you view my pictures. The wiring harness connectors fit into my cars harness like it was manufactured a the plant which built my car. The car dealer where I bought the car tried to sell me on them installing hitch and wiring because they claimed your products would need a lot of retrofitting. This was not the case at all. Everything you supplied fit perfect without any necessary modifications, however I did make a modification to the wiring harness to fit my own needs. I did not like the idea of sticking it out the trunk, so I went to local parts store and picked up a special bracket and connector to install onto the trailer hitch, thus having connector outside car as it should be. If I did not make this mod it would have only taken 10 min. to install. You can see this connector mod in the picture I am sending you. I have recommended this site to many other people in my fishing club and at work. My brother-in law has just ordered one for his car, seeing how easy my in-stallion was. With your help and a desire to save allot of money anyone can install a hitch, even if you never did one before. The two wire feeders for the bolts worked great, I never saw this technique before. Without them the job would have been tough to say the least. As you mentioned, it is wise to have another person help when it comes time to lift the hitch into position. My brother in -law helped me, now he is buying a hitch and I shall help him lift it into position. Maybe if I was not 63 I could have done the job myself. 14565

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by: Ken R09/18/2017

2017 Subaru Outback Wagon

I am very happy with the trailer wiring harness which plugged in and has worked flawlessly since I was finally able to get it connected. Because my car was new I was very cautious about the install. The directions were good and clear. The only problem I had was in "finding" the wiring from the driver's side of the rear compartment. I removed all of the loose styrofoam and other parts that were in the way. This went easily and according to the directions. Retrieving the wire from under the carpet/sound-proofing above the wheel well was the only difficult part. Because the car was new and I didn't want to damage the fabric glued to the body, I reviewed the Video and even went to my dealership to be sure I had not over-looked a step. With my big hands, I was finally able to reach and pull out the wire and plug in the harness without any damage to the sound barrier or wires. The rest was easy. Since I only use a trailer periodically, I chose to leave the trailer connector in the Tire well and not mount it permanently on the outside with the hitch. Looks and works great and I am happy to let friends know I did it myself and save probably over $100. 433695

Still very happy with it and the installation. The Wire gets compressed when I close the back door, so I am considering getting a permanent mount and running it out through the trunk liner. But Im just enjoying having all my lights work and not having to be home by dark.

Ken R - 09/19/2018

Wasted an hour following the video installations for the 2017 and 2018 Subaru Outback models as I could not locate the cars wiring plug and it was extremely difficult and painful reaching under the panel and I have relatively small hands. Finally read some other reviews and unbolted the tie down hook which easily exposed the wiring plug. The tie down hooks bolt is exposed by popping the plastic cover in the middle of the hook with a screwdriver and removing the 10mm bolt. I think the video should be edited to show this alternate procedure. Otherwise tested and works correctly. Except for the installation frustration I am satisfied. 544041

The Tekonsha wiring harness arrived without delay and was exactly as expected. Installation on my 2018 Subaru Outback went smoothly thanks to the excellent instructions and video that e-Trailer.com provides. The feedback and reviews of other customer are also very helpful. I reviewed the instruction video several times and read some of the reviews. I had absolutely no issue to install it in a few minutes. It is a little tricky getting my big fingers behind the panel to pull the connector down that is taped up with blue tape. Once you have that down, the rest is a piece of cake. I would also like to comment that I also installed the DrawTite 2" Receiver hitch. This installation went quite well, although I must say that the e-Trailer video, and instructions supplied with the hitch are not as good as the explanations of some of the reviewers. For example, it is much easier to pass the bolts and spacers from the top (inside the truck area) by enlarging the existing holes in the cargo area floor, rather than drilling a new hole in the bottom of the frame as per the instructions. I also discovered that it is possible to do this by only enlarging the two forward holes in the cargo floor, rather than all four. It is very easy to fish the rear bolts from the front hole if you pass the fish wire in from the bottom rear hole in the frame. Another trick from other reviewers that was very helpful is to mark the heat shield with a Sharpie from inside before you remove it and then drill it rather than trim it with metal shears. It gives a much nicer looking job. Finally, I discovered a trick that really helps to align the hitch when bolting it up. Take four of the M6 bolts that were removed from the heat shields and put them into their holes through the hitch. Once this is done, the hitch is perfectly aligned and you can tighten and torque the four large nuts holding the hitch in place. If you do this, your heat shield will bolt up easily without any issue of the bolts not aligning with the holes. Actually, there was one issue that is not mentioned in any of the reviews that I read, and it would be really nice if DrawTite could fix. This is that fact that the 2 forward original M6 bolts for the heat shields next to the frame that must pass through the hitch flange are too short with the spacer washer placed as per the instructions. The installation kit should include replacement bolts that are about 1/2 inch longer so that they can pass through the hitch flange and the spacer. Unfortunately, the original bolts are too short and stripped when trying to install because they were only holding with a few treads. Now I have to go an buy some longer bolts and repeat the process of lowering the mufflers and exhaust pipe to install them. It would have been nice to know before as I could have easily purchased them in advance. I am very satisfied with e-Trailer.com and their excellent website and service. It certainly is my first stop when looking for anything related to trailers. 516819

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The product is good, but the directions are terrible. I had a very difficult time finding the wiring plug on the Subaru Crosstrek with the direction included. I had to go to Subaru and look at their wiring instructions. Even theirs took a while to figure it out. 127488

The harness is still working well. I have it so the plug is inside the vehicle when not in use, so the salt does not destroy it during the winter.

Rich A - 04/26/2015

Trailer plug works great , the directions not so great . Opened the rear hatch removed carpet and center storage unit removed the driver side panel as instructed trying to find the harness. It’s not in the location it’s supposed to be. It’s on the driver side rear . Remove one #2 Philips and pull side panel and it’s right there near the tail light. Unplug the cap and install the plug . Run wire down and out the bottom. Easy if you know where it is! 558893

2014 Forester factory trailer plug location - FYI The plug is located in the upper aft corner of the drivers side cargo panel. You must remove the tail gate panel, remove the cargo hold down and one screw from the upper bag holder. Then pop the aft edge of the trim panel out. The plug is not accessible from below the panel. 141183

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This is the 2nd time I've bought a wiring kit from etrailer that was "Plug & Play". The stock Subaru trailer connector was right where they showed to be in the video & was easy to get to. I don't care for the idea of running it over the tailgate & body seal so I chose to run it through a conveniently placed rubbed plug in the spare tire well. The tire is held up off the harness by the hard insulation in the tire well bottom. A little silicone sealant around the harness where I snipped the plug to keep the water out & we're done! 179584

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Plug and Play, it was just that simple. The video was correct too. 941331

Shipping & handling excellent. Shipping quick. All items ordered sent. 941164

It took me one hour to install this includes getting my tools, a screwdriver, and dispose of off and end strewn in the trunk area. 941101

I just installed this on a 2017 Subaru Outback and it works as expected. I think this is one of the best harnesses out there, because it is quite compact and noninvasive – it does not need separate ground wire to be crudely screwed to the body. Since the car manufacturer provides the plug for the harness, it also has the ground on one of the pins in that plug, which probably is factory bolted to the body somewhere, but saves you from doing it yourself and it also makes perfect sense: if a plug is provided, the respective ground to be provided as well. About the installation procedure. It's quite easy with the only hard thing on the 2017 Outback is releasing the car plug from its entangled spot under the panel in the cargo area. It was also further complicated by the cable, that is used for releasing and flattening the rear seats' backs, being in the way. The instruction video suggests removing the cargo hook. It's a very useful suggestion and you should do it. I managed to release the plug without removing the hook but it was a huge pain. However, if you decide to do it the hard way (like me), it might be a bit easier if you approach it from the back seat and pull the wire towards the front of the vehicle to release it. 940978

Easy install! Read instructions thoroughly first. Relax, its simple. 940624

The products arrived in a timely manner and ordering them with simple especially with the attached videos that show installation. Excellent marketing strategy 940619

Fast delivery, location of wireing plug was on the driver side on my 2021 Subaru crosstrex instead of the passenger side as shown in instructions after taking the passenger side apart. 940611

East to install with easy to follow instructions I mounted it a little lower so no trimming of the foam was necessary 939610

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939354

I added lights to the end of my bike rack that I use on my 2020 Subaru forester. I watched the installation video for the Tekonsha T-One trailer wiring kit before I made my purchase and again after receiving the kit. Honestly the installation was quite simple and took at the most 15 minutes. E-Trailer videos are great and recommend E-Trailer to all. 937595

The hitch was easy to install. Watched the videos on installation of hitch and wiring and had it all installed in less than an hour. 936488

Easy to install. I like that it sits in the spare tire compartment when not in use. The installation video was spot on for my 2019 Subaru Outback. I bought a receiver hitch primarily for my bike rack, and added the wiring harness for the rare need to tow a trailer. 936434

by: jongordo801/11/2021

works great 936337