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Wiring for towing doesn’t have to mean cutting into your vehicle’s factory wiring. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs right into existing connectors, giving you a clean setup with no splicing. It’s built as a plug-in harness, so it connects directly to the vehicle’s wiring for a simple and reliable install.
Some vehicles can’t handle the extra amperage from trailer lights on their tail light circuits. This harness uses a powered converter that draws power straight from the battery instead of overloading the vehicle wiring. That setup keeps the factory circuits protected while giving your trailer full lighting function every time you tow.
The built-in 4-flat connector gives you what most trailers use—running lights, turn signals, and brake lights. It’s a standard connection that makes hooking up a small trailer or utility hauler quick and easy.
Designed as a visible, plug-in trailer hitch wiring harness, this setup routes neatly to the back of the vehicle. It keeps everything organized and easy to access when you’re ready to tow.

Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews

Tom S.
3/16/2018
Still performing very well. No complaints.

Roberto
10/8/2022
Continues to work perfectly. Forgot it existed! Perfect.
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Eugene W.
8/14/2018
Worked right up to the point the car was totaled from the rear. Good product.