RV Dinghy-Tow Wiring Harnesses CURT RV harnesses make it easy to connect and dinghy-tow your vehicle behind your RV. Each RV wiring harness is vehicle-specific and plugs into the existing wiring system to provide a standard 4-way flat for plugging into the RV socket. No cutting or splicing is required![PDF] installation tips INSTALLATION INSTRUCTIONS 6- or 7-way connector, feed the entire harness through the large mounting hole in the bracket and position the connector against the face of the mounting bracket. Using the supplied mounting hardware, attach the connector to the bracket. Slide the 4-way flat connector into the side mounting slot until the connector is secured in place. Electrical Adapter (4-Way Flat Vehicle to 7-Way RV Blade Adapts a 4-way flat vehicle socket to fit 7-way RV blade trailer plugs. 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power. Spring-loaded dust cover keeps connector clean when not in use. Slit loom keeps wires contained and well protected.[PDF] 7 Way Plug Wiring Diagram - countrytrailer 7 Way Plug Wiring Diagram Standard Wiring* Post Purpose Wire Color TM Park Light Green (+) Battery Feed Black RT Right Turn/Brake Light Brown LT Left Turn/Brake Light Red S Trailer Electric Brakes Blue GD Ground White A Accessory Yellow This is the most common (Standard) wiring scheme for RV Plugs and the one used by major auto manufacturers today.