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Wiring a trailer can be a real headache if you have to splice into factory wires. The Curt T-Connector with 4-Pole Flat Trailer Connector skips that work entirely. It plugs directly into the vehicle’s existing tail light connectors for a clean, factory-style hookup. No wire cutting, no guesswork—just plug it in and it’s ready to go.
Trailer lights can overload a vehicle’s delicate lighting circuits if not properly isolated. This harness includes a powered converter that draws power directly from the battery, not the tail light wiring. It keeps the vehicle electronics safe while sending a strong, consistent signal to the trailer lights every time you brake or turn.
The harness uses a hidden plug-and-lead layout so you can route the 4-flat connector out of sight when not towing. It’s a simple way to keep things tidy while still having quick access when it’s time to hook up the trailer.
Even if the vehicle doesn’t have a tow package, this harness has everything it needs to make towing possible. The direct-fit connectors and converter let you add trailer lighting from scratch, making it a solid DIY option for anyone setting up towing for the first time.
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews
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William
10/1/2026
This is still working great after a year. Highly recommended.