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Wiring a trailer can be tricky if you have to cut into factory wires, but this harness skips all that. The Curt T-Connector plugs directly into your vehicle’s tail light assemblies to give you a clean 4-flat connector. No splicing, no wire chasing—just plug it in and it’s ready to go.
Many trailers draw more power than your tail light circuits can handle, but the integrated powered converter solves that. It uses a dedicated power wire that runs to the vehicle battery so the trailer lights get their power without overloading your factory system. That setup keeps your vehicle wiring safe from shorts or overloads.
Once installed, you get a standard 4-pole flat connector for your trailer’s running lights, turn signals, and brake lights. It’s the simple, reliable hookup used on most small and mid-size trailers—ready for towing right away.
The harness tucks in behind the tail light housings for a neat, hidden setup. The result is a factory-looking install with only the 4-flat plug visible when you’re ready to tow and out of sight when you’re not.
Customer Satisfaction Score:
92% were satisfied with this product
8% of customers were not satisfied
Ratings & Reviews
Easy to install. Excellent value. Highly recommend!!
got it and haven't instaled it yet
easy to install
Works great on my Ford Focus ST. It's not trivial to run the wire up to the battery, if you don't have a lift, but it can be done with a little time.
Good product, used etrailer several times, always good.
Product arrived within 2 days wow, The package was exactly as described and had video clips showing how to install. Great company, excellent service.
Thanks
Great company. Arrived on time. Very easy detailed instructions. Will buy from them again
Great product worked as it should. Came on time as promised ! Communication was great tracking the shipment
Will do buisness again
Installed perfectly. Did not run the positive wire under the car, instead I ran under trim along driver side of the interior and through a plug on the firewall about pedals. I do not like the idea of that wire underneath a new car.
etrailer makes me fell like they care and then prove it by their actions. One awesome company.
After having 2 kits sent by the largest supplier AM.... that were packeged with the wrong kits but marked ford focus hatchback, i contacted Curt and they suggested another supplier. Your profesionalism and tracking is second to none. Finally got the right one. I will be using you in the future
The product was at my door in less than a week fit perfectly worked just as described very happy with their service thanks a lot etrailer
Good instructions, worked the first time
Everything I ordered came in with no issues. Wiring kit, receiver hitch and 2 balls. Quick shipping and no problems. Thank you!
Great product that works well, it’s just a pain to install. See my review of the Ford Focus RS Curt hitch as well. Definitely remove your lights even though it doesn’t say to.
Great all in one wiring harness. Took longer to install than the hitch. Could just be thrown into the spare tire well, but for a clean tidy install it takes a bit more time and effort. Take off your interior panels and do it right, you'll be much happier.
I installed the trailer hitch wiring in about 3 hours. It was very easy to do after watching the great video provided with this product. No problems...everything worked like a charm.
Not a product review, I'll need some time to make that determination. As far as service goes, it seems like these guys are doing it right considering the niche they are in.
The online search/selection and order process was easy and efficient. I received an order confirmation immediately, and a shipping confirmation on the same day. The package arrived when they said it would. I also received a personalized delivery confirmation email which is always appreciated.
As of this writing I have not yet installed the tow bar and wiring kit for my 2015 Ford Focus ST, but my experience up to this point has been excellent.
Great harness. Clipped into my existing vehicle harness with no issues, trailer lights work great
Matt
5/17/2020
Still works perfectly
The hitch is fairly straight forward and easy to install. The instructions are OK - not great - just OK, BUT... The etrailer videos for the hitch and wiring harness were BRILLIANT. My only criticism is that I found them by accident - I didn't realize they were out there. That being said, it took me less than 30 seconds to find them. They were much better than the printed instructions. I had a tablet out set next to me and it literally walked me through the painless process. Thanks! So, all in all, this was a very affordable and easy process thanks to etrailer.
The hitch wiring went in great. I put in a thicker spacer 3/8 inch between the frame and the hitch which gave a better clearance from the plastic bumper cover and the receiver it went very well. The electrical wiring went well with the directions given. I have a focus ST and a pull a trailer with a zero turn 60 inch Ferris mower and it works very well.
Works well, clear instructions. Etrailer youtube video for my car was very helpful.
I had never installed a powered trailer light module before, but liked the idea of not over-taxing my tail light circuits with the trailer lights. This Curt product is very well engineered and includes everything needed. The instructions for the rear harness mounting and connections were excellent. The only exceptions was they instructed that you disconnect the vehicle battery, then open the rear hatch :) TIP: Open the hatch first! The installation took a couple of hours. I utilized an unused power seat circuit in my rear fuse panel for power which saved me from having to run the provided power line up to the underhood battery. The instructions didn't suggest any particular route for this feed line and I didn't see any easy protected path to take without removing a lot of interior trim or a few underbody closeout panels. If your Focus ST doesn't have the power seat option my method works great. Nice harness, works perfectly. Curt does a great job engineering trailering products to specific fitments. I'm surprised they took the time to accommodate the Focus ST and am grateful. Thanks E-trailer for the great website, price, and fast shipping!
Gwendolyn Y.
12/31/2024
Hey Wade! Thanks for sharing. It is always best and safest to rout a power wire up to the battery. Sometimes it hard to know if open and unused circuits will be able to handle what a trailer is needing when hooked up.
Info for this part was:
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Rick K.
1/16/2018
Both the hitch and the wiring harness are fine. I had trouble connecting the wiring harness because I did not pay close enough attention to the pictures in the instructions.