Big Truck Trailer Wiring Diagram

If you are looking at the inside of the trailer connector where the wires mount to the terminals starting at the top and rotating clockwise.

Big truck trailer wiring diagram. As the name implies they use four wires to carry out the vital lighting functions. These 2 wire diagrams fit the needs of most trailers. We have an excellent wiring diagram on our website i will provide you a link so you can look at it. Use only the needed wires and ignore the others.

4 way trailer connectors are. When wiring a trailer connector it is best to wire by function as wire colors can vary. Expand the same for additional axles. Each one of these suggestions are illustrated with practical examples.

I have also included a picture that shows the typical wiring diagram of a 7 way round pin trailer side connector. 7 blade wiring diagram for trailer wiring library big tex trailer wiring diagram wiring diagram. Options packages now that you know the types of connectors you have to determine what you have on your vehicle to make the connection to a trailer. As you can see the 7 way round pin trailer connectors do not use the typical pin functions.

4 way trailer connectors are typically used on small trailers such as boat snowmobile utility and other trailers that that do not use brakes. The image above shows a single axle trailer and the next image shows wiring for tandem axles. Only the blue brake and white ground wires are different. Many modern tow capable trucks and suvs especially those by the big three come equipped with trailer packages from the factory as part of the uscar program.

They also provide a wire for a ground connection. Typical trailer wiring diagram and schematic.