First Class 4 Pin Trailer Harness Wiring Diagram

Learn how to repair a trailer wiring harness that was damaged when borrowed by someone who did not connect the wiring to their vehicle.

4 pin trailer harness wiring diagram. Trailer wiring diagrams 4 way systems. Trailer plans trailer build car trailer utility. Connecting the wrong color wires will result in mismatched taillight functions and confusion on the road.

This 4 pin trailer harness wiring diagram version is much more suitable for sophisticated trailers and rvs. Blue electric brakes or hydraulic reverse disable see blue wire notes below in the trailer wiring diagram and connector application chart below use the first 5 pins and ignore the rest. Right turn signal stop light green left turn signal stop light yellow taillight license side marker brown and a ground white.

This is connected to each pin of the connector. Same as 4 way system listed above but adds a extra blue wire for brake. White pin for the ground.

It s the 4 pin connector. 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. 4 way tow vehicle side.

Make sure that all cables are electrically conductive. Traditional trailer with brakes use a 5 pin connector. 4 way flat molded connectors allow basic hookup for three lighting functions.

Installing your 4 pin trailer wiring system is easy if you follow the correct procedure. The fundamental diagram for the connector is very similar to aforementioned types. The first thing you need to do is make sure that your connector works properly.