CURT 4-Pin Flat Wiring Harness for Rewiring Trailer, Includes 20-Foot Wires Model 57220CURT 4 Pin Flat Wiring Harness for Rewiring Trailer, Includes 20 Foot Wires Model 57220 Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer's electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. CURT electrical connectors are designed and manufactured to give you a reliable connection every time you