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Running trailer wires the old-fashioned way means splicing into factory wiring, but this harness skips all that. The Curt T-Connector plugs directly into existing vehicle connectors for a clean, factory-style setup. There’s no need to chase wires or guess at connections—it’s all built for plug-and-play installation.

This kit draws power directly from the vehicle battery through its powered converter, adding an extra layer of circuit protection. The 10-amp fuse keeps both the vehicle and trailer wiring safe from shorts or overloads, so you won’t risk damaging sensitive electronics or lighting systems.
The 4-pole flat plug delivers the basics every small trailer needs—running lights, turn signals, and brake lights. It’s the common standard for most trailers without electric brakes, making it easy to hook up and hit the road with confidence.
This wiring harness doesn’t interfere with vehicle electronics like reverse cameras or sensors. Everything functions exactly as it should while still powering your trailer’s signal lights, so there’s no trade-off between convenience and compatibility.
Since it provides the essential 4-way connection, it’s also a perfect starting point for upgrading to a 7-way system later on. Just add an adapter kit when you’re ready to tow with electric brakes or a trailer battery charger.
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews

Barbara
3/13/2019
No problems- wiring kit was installed by a local trailer business & has performed with no issues. Thanks for the follow-up

George
6/14/2022
After one year of service, its still performing as when new. Highly recommended product.

Vanb
4/7/2018
Everything is great! Thank you.

Joshua
5/22/2024
As a person who grew up having to cut and solder back connections to wire up a harness. This set up is probably the fastest and easiest harnesses I have ever installed. I would recommend this to anyone.

Bill S.
4/24/2021
Plug in broke while I was on the road. I had to buy a new harness at a parts store and rewire it myself in order to continue on my way and have lights on my tear trailer

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Kate F.
11/19/2025
What is your year, make, and model? Can you please further explain by what you mean by "fired my stuff"? Or do you mean that it fried your electrical? I would like to learn more so I can figure out exactly what happened.