Wiring Diagram for 1989 Procraft 180 Page: 1 - iboats Jun 03, 2009Re: Wiring Diagram for 1989 Procraft 180 I moved this to Boat Topics as the Electrical section seems more to do with Accessories as opposed to the base wiring. You can find a brazillion basic wiring diagrams on the net and there are two in the FAQ section at the top of Repair and Maintenance vvvvvvvv. Trailer Wiring Diagram - Wiring Diagrams For Trailers Trailer Wiring Diagram. Not sure which wires attach to what on your trailer connectors? Does one of your turn signals not work and you’re not sure which wire to inspect? Check out or trailer wiring diagrams for a quick reference on trailer wiring. The below information is for reference and is commonly used throughout the industry, but can Trailer Wiring Diagram For 4 Way, 5 Way, 6 Way and 7 Way Trailer Wiring Diagrams 4 Way Systems. 4 way flat molded connectors allow basic hookup for three lighting functions; right turn signal / stop light (green), left turn signal / stop light (yellow), taillight / license / side marker (brown) and a ground (white).