Stop paying for a whole new wiring harness when only the connector end is damaged. The CURT 56229 is a dedicated USCAR-style 7-way replacement end that lets you splice onto your existing trailer cable and restore a solid, weatherproof connection in minutes. Whether you backed into a dock post, melted a connector, or simply need to extend your harness, this is the correct repair component for trailers wired to the modern USCAR 7-pin round standard.
The USCAR 7-way connector standard has largely replaced the older SAE flat-pin design on late-model trucks and SUVs from GM, Ford, FCA/Stellantis, and Ram. If your trailer's wiring uses a round 7-pin plug and your tow vehicle has a matching USCAR-style socket on the receiver, the CURT 56229 is your direct replacement end when the existing plug is cracked, burned, or corroded.
CURT's 56229 is built to the same USCAR round-pin specification used on OEM trailer connections, so it mates cleanly to factory receiver-end sockets without adapters. The connector carries all seven circuits -- electric brakes, running lights, left turn/brake, right turn/brake, reverse/auxiliary, battery charge, and ground -- covering every trailer wiring function for travel trailers, fifth wheels, flatbeds, horse trailers, and boat trailers.
All seven trailer functions supported: brakes, running lights, left/right turn-brake, aux/reverse, 12V charge, and ground.
Designed to splice onto your existing trailer cable -- no need to replace the full harness when only the plug is damaged.
Mates directly to factory USCAR-style vehicle-side sockets on GM, Ford, Ram, and other late-model tow packages.
At 0.48 lbs and 9.0 x 4.0 x 3.0 inches packaged, it stores easily in your trailer toolbox for roadside repairs.
USCAR (United States Council for Automotive Research) defined a round 7-pin connector specification that automakers adopted to improve durability and weather resistance over the older SAE 7-way blade connector. The USCAR plug features a round housing with a locking collar, seven round pins arranged in a circular pattern, and a contact size and spacing different from the legacy flat-blade 7-way. The two connector types are not interchangeable without an adapter -- confirm which type your tow vehicle uses before ordering.
The 56229 is a connector end only -- no pre-attached cable. You will strip and insert your existing trailer wires into the terminal positions of this replacement end and secure them per the standard USCAR wiring color code (typically: white = ground, black = 12V charge, blue = electric brakes, yellow = left turn/brake, green = right turn/brake, brown = running lights, purple = reverse/aux). A proper weatherproof connection is recommended at each terminal to prevent corrosion-related voltage drop.