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Installing a trailer connector shouldn’t feel like a puzzle. With the custom-fit T-One connector, you can seamlessly integrate a 4-way flat trailer connector directly into your vehicle’s existing wiring system. No splicing, no complex wiring mysteries here—just a quick and straightforward plug into your vehicle's harness, making your towing setup ready in minutes.
Worried about straining your vehicle's electrical system? The ModuLite powered converter has your back! It ensures that your vehicle’s sophisticated three-wire light system perfectly syncs with the two-wire system of most trailers, cleverly combining brake and turn signals. The module draws power directly from the battery, avoiding any overload on your vehicle’s circuits, giving you peace of mind on every trip.
When it comes to wiring, durability is key. The harness's 16-gauge bonded wire construction ensures robust performance even in demanding towing conditions. It’s tough and built to last, so you can trust it to keep your trailer in sync every time you hit the road.
Let’s face it, car installations can be intimidating. But with handy step-by-step guides and a supportive community, installing this harness is a breeze. Many have praised the harness for its easy installation process, even for those with minimal technical know-how. You’ll find that getting everything correctly set up can be faster than you might think.
Imagine a world where your trailer connectors stay dirt and moisture-free. The thoughtful inclusion of a dust cap ensures your 4-way flat connector remains pristine, enhancing longevity and ensuring reliable connections every time.
Trustworthy towing is about the specs, too. The harness supports a maximum of 5 amps per circuit for stop/turn lights and 7.5 amps per circuit for tail lights. These specs ensure your trailer's lights function flawlessly, keeping you safe and visible on your journeys.
This will not affect how the tail lights on your vehicle operate.
California residents: click here
Product quality is as advertised and the installation videos are detailed and easy to follow.
Easy install. Bought this with the Curt Class III hitch. All components match up and install without a struggle. The Tekonskha Custom Fit harness incorporates turn signals, running lights and brake lights.
Very easy to install with the helpful v ideo.
All parts arrived in a speedy manner and in great condition! Big thank you to Brent J for all his hard work and extremely fantastic customer service!! Easy to follow install videos for tow hitch and electrical components. Thanks etrailer Team!!
Product was exactly what I needed for my Subaru ascent, and easy to install with the instructional video supplied
Vehicle specific video made the installation a breeze.
I purchased this for my 2019 Subaru Ascent along with a Drawtite hitch 76253 and a brake controller with a dash mounted control knob so that the actual controller is hidden near the steering wheel shaft hidden under the dash. All three items were installed and we enjoyed a great summer of RV trailer camping in the summer of 2019.

John
5/1/2021
I had an RV service professional install it because I am too claustrophobic under my Ascent and I am very happy that it is hidden behind with only the control button visible and it works great!
Great product. Super easy to install.
Very easy installation, I followed the video online and got it down very quickly.
Great instructions and installation!

Steven
4/21/2023
It’s been a year already?!, time flies and it works great! Doing some remodeling and had to hook up my old harbor freight trailer to haul the deconstructed 10x20 shed to the dump. Wiring was fine!
Great product. Works perfect and was very easy to install and disappears when not in use.
Arrived quickly with my hitch and, after watching the video (A must!), it installed very easily and quickly with no surprises! This can easily be installed with just the tool needed for attaching the ground wire.

Travis P.
3/30/2020
Great! Required some voltmeter testing to match the right wire to the right harness wire though.
This worked well on my 2020 Subaru Ascent. The only reason for 4 stars instead of 5 is due to there not being a clamp or something to hold the final cable in place. It isn’t a big deal, you can tuck it into the bumper and that seems to be fine but would have liked a better setup there. Overall great harness and pretty easy to install.

Beau
2/23/2023
Been great over the past year. Used it on a few different trailers and uhauls. No issue and the harness hasn’t fallen out so no issue there
Very easy to install. The only difficulty is actually getting to the place where the harness is to be placed. Instructions are easy to follow and, with a little care, the system can be installed with no issues.

Bruce
8/24/2021
Still working very well.
I ordered this item along with the trailer hitch and a bracket. The item was packaged great and arrived in timely fashion. The company was fantastic to work with and service was outstanding.
Finally, the online tutorials on the etrailer website made putting these items in place easy.
I am 150% satisfied with everything this company has done!
I have been using etrailer.com for several years on multiple vehicle hitch and wiring projects and I have always been very pleased with the product and my experience. This time was no different. I needed to install a hitch and wiring harness for a 2020 Subaru Ascent. The parts that were matched with my vehicle online fit perfectly. The instructional videos that accompany every part are outstanding. Each step is clearly explained and easy to follow. Once again, etrailer.com delivered exceptional service, prices, parts, delivery, and everything else I needed to complete my hitch and wiring project in just a few hours. I highly recommend etrailer.com and I will continue to be a customer for several decades to come.
what else can I say but EXCELLENT
r>JIM
Very helpful staff. I had trouble with the shipping companies which sent the order to the wrong location, not etrailer's fault. The team at etrailer resolved the shipping issue. I am satisfied with the merchandize I received, etrailer stands behind their products and were helpful in selecting the right combination of components. Great company, great phone service!
Product was as described. It fit perfectly on my 2020 Subaru Ascent an was very simple to install the hitch and harness. Took about about 75 minutes. Products were high quality. Also saved about $700.00 if a Subaru dealer installed. When not in use it is totally concealed by the center removal bumper face plate.
Highly recommend this product.
This harness was super easy to install and run down through the grommet to the hitch for easy access. I ended up adding some plastic wire loom for protection under the car but was highly satisfied with all of the components in the kit. Watch the video clip for some tips and order with confidence!
Best experience I have ever had buying car parts! Sales person (Melissa) was competent Delivery was 2 days (a day ahead of schedule), instructional videos were concise and clear. Trailer hitch and harness were well made and fit perfectly. Installed cost was less that a fourth of OEM quote.
The install was straight forward. If I hadn't been also installing a trailer brake controller the entire install would have taken all of 15-20 minutes. Very simple!
The product had all the necessary instructions and parts to make the installation very easy. The harness is very simple to use.
I was impressed with the installation service, the finished appearance and the price.

Paulette W.
1/3/2022
Its great!
What you see is what you get. Works perfectly. Instead of leaving it laying in the cargo bin i ran mine through the grommet for the tail light over the bumper and on to the hitch. That was a bit of a struggle with the size of the cap since it didn't flex very well but not major. Arrived ahead of expected shipping date with everything needed to install.
Super easy to install. The install video walks you through each step, and there were no surprises when I installed it on my vehicle. Really like the black box that protects the vehicles wiring in case I rent a trailer with a short in it.
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Victoria H.
3/22/2025
I'm happy to hear the install videos came in handy for you John! Towing anything fun?