Dump Trailer Wiring Diagram. Here is the diagram for 7 pin connector. Purple for backup lighting.
A wiring diagram is a simplified standard pictorial depiction of an electrical circuit. It ought not be carrying heavy loads throughout the trip. Purple for copy lights.
Yellow pin for left brake light and left turn markers.
4 way trailer wiring. Red 12 volt auxiliary power. Sometimes the wires will cross. Yellow pin for left brake light and left turn markers.