Car Trailer Wire Diagram. Trailer wiring diagrams trailer wiring connectors various connectors are available from four to seven pins that allow for the transfer of power for the lighting as well as auxiliary functions such as an electric trailer brake controller backup lights or a 12v power supply for a winch or interior trailer lights. Adaptor for 13 pin vehicle to 7 pin trailer.
Rh tail lamp end outline no plate lamp. This car to trailer wiring diagram version is far more acceptable for sophisticated trailers and rvs. A 13 pin socket on a trailer with reversing lights will need an adaptor when coupled to a 7 pin socket on a towing vehicle however the reversing lamp will not be functional.
Shown from inside the plug.
It can transfer power better hence the connector is suggested for higher level electric in the vehicle. 322005 120108 pm. 7 pin flat the best. White pin to your ground.