Stop fighting universal wiring kits that require cutting into your vehicle's harness. The CURT 56320 is a vehicle-specific T-One connector that plugs directly into your existing tail light wiring, tapping into the factory circuit without cutting a single wire. The result is a clean, factory-grade trailer lighting connection that passes brake, turn, and running light signals to a standard 4-flat connector at the rear of your vehicle.
The CURT 56320 is part of CURT's T-One Custom Wiring Harness line -- one of the most trusted vehicle-specific trailer connector systems in the aftermarket. Rather than using a generic converter box and wire taps, CURT engineers each T-One harness to match the exact tail light plug configuration of a specific vehicle or group of vehicles. You unplug the factory tail light connectors, plug in the T-One harness in-line, and the 4-flat output hangs ready at the bumper.
This approach matters because modern vehicles increasingly use separate circuits for left-turn and brake signals. A T-One harness with a built-in converter (where applicable) combines those signals correctly for the trailer's shared stop/turn wire, eliminating flickering brake lights or blown fuses that plague poorly wired tow setups.
Plugs in-line with factory tail light connectors. Remove, install, swap vehicles -- no permanent modification to OEM wiring.
Engineered to match the exact plug configuration of the application, not a generic adapter that may require further modification.
Terminates in a standard 4-way flat connector compatible with the vast majority of utility trailers, boat trailers, and cargo trailers.
Built-in converter and protection circuitry (where required by vehicle) safeguards the tow vehicle's electrical system from trailer-side shorts and overloads.
The 4-flat output on the CURT 56320 carries the four standard trailer lighting circuits:
Installation on a T-One harness is straightforward for a DIYer with basic hand tools:
The 4-flat output on the CURT 56320 connects to any standard 4-way flat trailer receptacle. This includes the connector found on most boat trailers, utility trailers, jet ski trailers, small cargo trailers, and enclosed trailers rated for light-duty towing. It is not intended for trailers requiring 5-flat, 6-round, or 7-way RV-blade connectors -- those applications require a separate CURT harness with the appropriate output.