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Wiring a trailer can be tricky, but this Curt T-Connector makes it simple. It plugs directly into existing tail light connectors, so there’s no need to cut or splice factory wiring. The plug-and-play setup gives you a 4-flat trailer connector ready for basic towing functions—running lights, turn signals, and brake lights.
Some vehicles can’t handle the extra draw from trailer lights. This harness uses a powered converter that connects directly to the battery, keeping the vehicle’s electrical system isolated from the trailer. That design prevents overloading sensitive circuits and ensures reliable lighting every time you tow.
The built-in 4-pole flat connector is the standard hookup for most light-duty trailers. It provides the three essential lighting functions—turn, brake, and tail lights—plus a ground wire for consistent signal return. With solid terminals and weather-resistant construction, it’s built for long-term use on the road.
This hidden plug-in harness tucks neatly behind interior trim and along factory grommets for a clean install. Once in place, only the 4-flat plug is visible when you need it. When not in use, it stays out of sight, keeping the look of the vehicle clean and uncluttered.
If your vehicle didn’t come equipped with trailer wiring, this harness fills that gap. The included power lead and connectors provide everything needed to run independent trailer lighting safely—no factory tow package required. It’s a straightforward way to get full towing function without modifying your vehicle’s wiring system.

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William J.
12/31/2014
All of the products are working as advertised. Had no problems with installation and they all are still working perfectly! Thanks for having such great products and such great prices!Happy New Year !!!!