4 Pin Trailer Wiring Diagram. It is the 4 pin connector. The basic purpose remains the same whether your truck and trailer is using a 4 way 5 way 6 way or 7 way connector.
4 pin connectors 4 pin connectors are the standard used for most trailers. Brown pin for side markers tail lamps and running lights. The second diagram shows two brake lights two indicators two side lights and a fog light.
White pin for the floor.
In addition to being light it is recommended that the connector does not have any power draining attachment. It may transfer power better therefore the connector is recommended for higher level electric in the car. This trailer 4 pin wiring diagram model is much more acceptable for sophisticated trailers and rvs. Wiring lights and harness on the trailer using a common 4 pin setup.