Four Wire Trailer Wiring Diagram. A trailer with a 5-wire harness has connections for marker brake and signal lights as well as an electric braking system. As the name implies they use four wires to carry out the vital lighting functions.
Trailer Wiring Diagrams 4 Way Systems 4 way flat molded connectors allow basic hookup for three lighting functions. Connect GREEN wire to RIGHT STOP yellow or green. It shows the components of the circuit as streamlined shapes and the power and signal connections between the devices.
Right turn signal stop light green left turn signal stop light yellow taillight license side marker brown and a ground white.
Wiring Diagram Sheets Detail. Here is the diagram for 7-pin connector. This 4 Wire Trailer Hitch Wiring Diagram model is more suitable for sophisticated trailers and RVs. 4-way trailer connectors are.