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

You always have what I want at a good price. I have bought several hitches from you over the years and they are always good quality. Your installation instructions are always spot on.3145838

Installed on 1999 Subaru Outback. The wiring harness was a simple plug in, by the left tailight, but a little tricky to get it to run out of the car. There actually was an oval rubber body plug up under the fender that you can just barely see from inside, and you can feel from outside, that I popped out and put a hole in for the wiring harness to go through. It was also a little tricky to get back in place with the wires in it, but it ended up working out nicely.
It really was an easy install, plugged in, wires run outside, fastened them to car underneath, and checked lights. It all worked, 22357

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Mike D.

5/20/2013

The location of the connector plug is the same for the 1998 model Subaru Legacy Outback Wagon. I mounted the module under the panel to the left of the spare tire hatch. To remove that panel you remove the plastic trim around the tie down loops and pull the panel up. I removed some of the styrofoam under this panel to mount the module. The connector can then be fished easily up to the tail light connector. The 4 flat connector can then easily be routed out through the rubber plug at the bottom right of the spare tire well.

Customer Service really helped me out on this one. I had trouble locating the wiring harness in my 06 Forester. One quick call to customer service had me squared away. BTW-the plug on an 06 Forester is located by the passenger side rear light. It is bundled up next to several other connectors. See pictures.33800

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Great fitment!
I installed it myself. 3151005

This went on my 2006 Subaru Outback. It only took me 15 minutes to install. That included pulling out the side panels, connecting the wire and putting it all back together. Watch the video first and it is easy. 129328

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by: Jacob 03/28/2024

Fit like a glove 1755734

Very simple install on a Subaru Outback. Much better than the splice method of install.1691739

Hi Patrick, I received the harness today and had it installed within 5 minutes. I loved that I didn't have to cut, crimp, or trace any wires to get my Forester hooked up. Haven't had a chance to hook up with a trailer yet, but looking at the build quality, I don't have any reason to doubt it'll work awesome. Thanks,102530

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Outstanding quality and so easy to install. The online videos are worth a thousand words...My install looks as neet as the one in the video. 24898

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Shipping - The hitch, ball mount-kit, wiring harness, and brush all arrived quickly in a single, heavy-duty cardboard box. The packaging was excellent! There had to have been a hundred heavy-duty staples used to secure everything.

Installation - The video and paper instructions were spot-on and made the install much more straight forward. For two non-mechanics, it took us about 2 hours from the time we pulled the car into the garage until all the tools were put away to install the hitch, wiring harness, and mount the balls on the sleeves. We did not lift the car might have made it a little easier but totally doable. The only actual difficulty we had was pulling the rubber muffler mounts off. A little lubrication helps. Reinstalling them is easier.450719

Dan S.

11/8/2018

All items continue to work well with no issues.

Well constructed product, seems well made, but haven't had a chance to use it yet. The OEM installation instructions that came with the product were garbage. English, french and spanish were all stuffed on one side of an 8.5 x 11 page, and the one TINY photo provided for my car model didn't even come close to depicting reality... at least the reality that is my car. Throw the instructions out and watch the videos on the etrailer website and it will help immensely. I was disappointed though that the videos showed their installed product came with double sided tape to secure it, but the one i purchased has a bolt hole at the top and a zip tie, but no bolt or screw. The video and the instructions said nothing about where the product was supposed to zip tied to, or whether it should be zip tied or bolted down. The video and instructions should be updated to regard the actual product being sold. Had to knock off one of the stars. Everything else about the experience was fantastic.529550

Tom

7/2/2019

Used my hitch and harness for several fishing and boat camping trips in the last year. No issues whatsoever. Thoroughly pleased with both.

One of the easiest to install automotive electrical accessories I've ever seen. It took more time to empty the Subaru Forester's trunk area of shopping bags, snow shovel, etc. than it did to make the actual installation.

The Subaru wiring connector was not too difficult to find. It was a matter of running my hand along the wiring harness found in the spare tire well until I felt a pronounced lump under the tape. On this particular car, the connector was in the right rear corner of the tire well.58489

Mark S.

6/13/2014

I was a little dubious about closing the hatchback on the cable every time. However, after two seasons of using a trailer for camping trips and hauling things, Ive stopped worrying about it. I still have to make sure that the cable is in the right position before I close the lid not in the latch area and positioned so that there is just enough slack in the line to the trailer. Most of the time I have something in the trunk area that I can set on the cable to keep it in position while I close the lid.

Rachael H.

6/13/2014

Thanks for the reply. I am very happy to hear that you are pleased with your Tow Ready T-One wiring Harness. If you would like there are several bracket options that will allow you to mount your 4-way directly your hitch or vehicle. I have included links to a could of examples below for you. If you would like a no-drill option you can use the # 18140 in conjunction with the # 18144 to establish a 4-way mounting bracket on your hitch. For your Subaru you could see if there is a grommet below the spare tire compartment that you could slice and run your trailer wiring though. Then you can use something like the RTV 598 Silicone Gasket Maker # LT37467 to seal up the grommet.

Highly recommend - easy to install and no noticeable impact on the turn signal flash frequency.380161

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Product delivered within a few days. Extremely easy to Install. Took about 15 minutes total. Instead of sandwhiching the connector harness inbetween the rear cargo hatch/door and bumper area, I instead routed the harness through the rubber grommet located underneath the spare tire. This makes for a cleaner install in my opinion. A+++ for perfect fit, fast shipping, and easy install. 120957

Tpk

3/23/2015

Great product, unfortunately I sold the car. I now have a 2000 BMW 528i touring wagon. Wish you made a product for this car that didnt require drilling into the spare tire well. I dont like the idea of mounting a trailer hitch to the body. Need a solution that mounts to a more robust part of the vehicle. Travis

My friend Ann ordered this kit for me, everything is top notch, thank you. However, the problem I have has to do with my Subaru Legacy sedan, I have tried everything to find the vehicle's plug in to install the wiring harness, there isn't one that I can find. I have been in my past a VW mechanic for many years, so unless old age is confusing me, I wonder if you might have a plan. I was originally going to wire the harness in, then I saw how nice it is and thought what a great idea, just plug it in. So, for now I am still trying to find the plug in, they have it for the wagons but not for my 2006 sedan..so far.Thank you657041

Mike L.

6/14/2019

The wiring harness you purchased is a fit for the Legacy wagon model only, not the sedan. The sedan does not have the connector. For your vehicle, youd need part C59236 which would need to be hardwired into place.

Helpful Links

Custom-Fit-Vehicle-Wiring/Subaru/Legacy/2006/C59236.html?vehicleID=200638570

The dealership quoted me $200.00 to install wiring harness for my hitch. I watched your video, ordered the part and installed myself. I just needed to know where the connection was!!! Thank you. It was a great experience139462

Lynda D.

7/5/2015

Great

Easy once connector is locatedI just installed a hidden hitch and the T-one wiring harness on my 2008 Subaru Outback wagon. The vehicle's trailer harness connector is not where the instructions for the product say it is nor is it where previous users have noted it to be on previous models. For instance, there is no longer a side access panel to the taillight assembly. What you do is open the hatch at the back and pop up the carpeted floor panel to the left of the spare tire compartment, on the driver's side. Just pull straight up - it is attached by three plastic connectors. Then pop up, in the same way, the panel made of cardboard and rigid foam that lies beneath that carpeted floor panel. This exposes a narrow slot at the bottom outer edge of the rear compartment, in the hollow metal part of the car between the outside metal skin and and inside trim. The slot is several inches forward of the tail light. A wire bundle was barely visible at the very rear of the slot, looking like it was running to the taillight. INitially I ignored it and kept searching. But when I ultimately got around to reaching my fingers in and pulling on this wire bundle (after searching everywhere else), it turned out to not be connected to anything, but was the trailer wiring connector that had been bent into a loop at the factory and tucked into the slot. The T-One connector plugs right in. I cut out a square in the cardboard and foam base panel to run the wiring through so that the transformer box, or whatever it is, on the connector cable can fit in one of the spaces between the foam dividers that are glued to the panel and support the carpeted top panel. This way, the carpeted upper panel lays flat when snapped back into place. The cable was then routed down into the spare tire well. I cut a slice into the rubber plug at the rear of the spare tire well, as suggested by a previous user, and then a hole at the center of the rubber plug just large enough to fit the cable without distorting the rubber. I then pushed the plug back in place, with several feet of cable and the connector for the trailer now outside the vehicle. A little silicone glue around the cable where it passes through the rubber plug sealed up the spare tire well to finish the job.







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Chris D.

10/15/2013

Thank you for a very easy hitch to install. The wiring harness took a little time until I read the information from Craig P. and then it was a snap. Hauled 15 square bails this weekend. Thanks CD

Patrick B.

10/17/2013

Glad to know the reveiws help and that you get your setup squared away. Happy towing!

Installation was a snap. Remove the cargo area floor, find the vehicle connector, and plug in the harness. No splicing, shrink wrapping, cutting, trimming, or other extra work.149444

Tim D.

9/28/2015

These products continue to meet my expectations and I have had no issues at all. Thank you for offering such exceptional and easy-to-use products.

2009 Subaru Outback PZEV: Install video helped a lot, made everything easy. Wish it could show you how to attach it to the hitch without having to take it out of the car and shut the door on it all the time.594192

Mike L.

1/2/2019

The manufacturer specifically designed the harness so the connector would be deployed from the interior of the vehicle when needed. This is typically done on small SUVs and passenger vehicles that arent usually used for towing. Installing it in this manner keeps the connector protected from damage when its not being used. The rear hatch of your vehicle has weatherstipping thats thick enough that the wire for the trailer connector wont be damaged as long as you avoid the latch area. I have the wiring harness on my van installed this way, and its still working great after 5 years.

Arrived as described and plugged in easily; but that's the end of the good news. Didn't work at all the first time I tried to use it. Voltmeter indicates that power comes out of the car, fuse was fine, but no power reached the flat 4 connector.

I didn't test until over 30 days past arrival, so etrailer won't replace the plug. I had to pay to send it for a warranty return, it's been there for 5 days now, and is currently somewhere in the warehouse waiting to be dealt with. After long waits on hold no specific estimate on timing for return.

I'm out return shipping, original cost, and either can't use my trailer or have to buy another harness.

Summary:
Bad product out of box, OK maybe just a fluke. etrailer customer service not great. Annoyed customer.385216

Product arrived in good time and looks well constructed for the $. In my particular application, I had great difficulty getting the fuse block and black electrical module to sit neatly where it made the most sense as to the logical routing of the wire loom and cables. After attempting to route 4 different ways, I settled on stuffing the fuse block and electrical module into the inner body panel well beneath the drivers side tail light. I believe this part is applicable to several Subaru models and therefore, the length and spacing of the cable where the fuse block and electrical module are along the length of the wiring was not the greatest for my particular vehicle, a 2009 Outback wagon. Not bad, just could not route where I had hoped to for the neatest result.399187

by: J D Lovett04/02/2020

Every thing I get from etrailer is top notch. My car had a trailer hitch & wiring that the previous owner had U-Haul install. The trailer lights were on even when the ignition was off. I ordered the trailer light wiring from etrailer and installed it and problem solved. Thanks etrailer for really good products & instructions.773673

by: Thomas04/14/2018

Subaru Outback Wagon

Sorry, no pictures. I like the hitch and harness so far, no problems with towing my utility trailer. The only thing I might mention is that the harness outside of the car is rather long (2 feet longer then what I need), but that's not a problem as I just wrap the excess around the hitch frame, and save it for if I ever need it longer for some reason. There wasn't room inside the car under the mat for the excess length.
I still remember how easy it was to install the hitch, just bolted up the the existing bolt holes in the cars frame. (Subaru Outback) 497096

The item fit and worked exactly as described and the video help from this site made it very quick and easy to install. Thank-you1647061

by: Fred09/16/2019

I was really pleased with how this mounted. The video instructions at etrailer.com were very helpful. As expected, it plugged into the Subaru connection perfectly, and it worked. My challenges were to find and choose the most weather-resistant place for a hole to run the wiring through (I chose an incision in a rubber plug, then put silicone on it) and non-interfering location to lay the wiring. I accomplished those things and had a good outcome. ( I have since sold the car, so can't comment on longer-term usage).704538