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Wiring a trailer can seem complicated, but this harness keeps things simple. The Curt T-Connector plugs directly into your vehicle’s existing tail light connectors to create a 4-flat trailer connection. There’s no need to cut or splice wires, which makes it much easier to get reliable trailer lighting without extra hassle.
Once installed, the harness delivers all the essentials—running lights, turn signals, and brake lights—through a standard 4-pole flat connector. That means you can hook up small or mid-size trailers right away and know your lights will work the way they should.
Instead of leaving wires exposed or hanging below the bumper, this kit routes cleanly behind trim panels and exits through existing grommets. The result is a tidy, protected installation that looks like it came from the factory.
Modern vehicles use separate circuits for the lights, but trailers need combined signals. The Curt harness includes a powered converter that safely merges those circuits and protects your vehicle’s sensitive electronics from overload or feedback. It’s the key to keeping both your ride and your trailer’s lights working right every time you tow.
Ratings & Reviews
Everything was as expected. Easy job.
Easy to install work excellent
Product arrived at my home in reasonable time and in good condition. Everything as stated was in the box. Thank You
Great prices and fantastic delivery time. My second item and would recommend this great company to everyone Larry
Easy ordering and fast shipping
Product is great. Simple install following instructions. Maybe 20 minutes at the most.
The instructions were easy too understand and the install was quick. I would recommend this to anyone.
Easy installation. Works perfectly. Great installation video. No surprises. etrailer is the best single source for all trailering needs.
Great info provided by eTrailer folks on what would suit my needs.
Installed on a 2013 Kia Optima in one hour total.
Because Kia added panel access ports, I didn't even have to fully remove the trunk corner trim panels covering the light terminals.
Couldn't have been any easier to install.
Quality part and fast shipping. Plugged right into my vehicle.
Received the hitch and wiring kit for my 2015 Kia one day sooner than promised. I watched the video installation and and no problems installing either of them. I have ordered from E trailer several times and have always been pleased with their products and service,. GOOD JOB E Trailer.
I was apprehensive about doing electrical modifications on my car but found installation to be incredibly easy thanks to the video etrailer.com posted online. I especially liked that I didn't have to do any wire splicing. Additionally shipping was very fast. I received my order one day before I expected it.
This Curt trailer light wiring harness fits my Kia Optima very nicely. Once the trunk interior trim panels are removed the installation is simple.
I am a returning customer of etrailer several times over. They truly have excellent service and support and I will be returning again in future for all my trailer hitch needs!!!
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Matt
10/6/2018
The hitch and wire harness are working well. The hitch is holding up well on my every day driver in the good ole Ohio elements