Round 1 1/4 diameter metal connector allows 1 or 2 additional wiring and lighting functions such as back up lights, auxiliary 12v power or electric brakes. Some trailer builders just connect this wire to the frame, then connect the ground from … 7 wire trailer circuit, 6 wire trailer circuit, 4 wire trailer circuit and other trailer wiring diagrams.
The following page contains information about trailer to vehicle wiring diagrams including:
13+ 7 Wire Trailer Wiring Diagram. 02.07.2018 · the trailer wiring diagram shows this wire going to all the lights and brakes. Boat trailer color wiring diagram. Let's start with a map, and let's choose which functions we need, and which we don't. Trailer wiring is very important to towing safety.