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Wiring up for towing doesn’t have to mean cutting into factory wires. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs directly into existing tail light connectors for a clean, factory-style hookup. The plug-in design keeps the job simple and avoids tampering with delicate vehicle wiring.

This harness includes a powered converter that draws power directly from the battery instead of the vehicle’s lighting circuits. That setup protects sensitive electronics from overloads and prevents damage in the event of a trailer short. Running the dedicated power wire ensures safe and consistent lighting operation, even with LED-equipped trailers.
The 4-flat connector covers the essentials—running lights, turn signals, and brake lights—for small to midsize trailer setups. The connector is easy to plug in and gives you a dependable link between your vehicle and trailer lighting every time you tow.
If you ever need to check function, each wire path can be easily tested from the 4-flat plug or converter box. A solid ground connection and proper clicks on each tail light plug ensure consistent signals through every circuit. That means fewer wiring headaches and reliable lights trip after trip.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews

Dan. D.
6/21/2018
Great, no problems with hitch or wiring.

Joseph B.
12/9/2020
Everything has been great absolutely no issues!
Do you have a question about this Custom Fit Vehicle Wiring?
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Jack D.
7/2/2019
Just great!