4 Pin Enclosed Trailer Wiring Diagram. Trailer Wiring Diagrams showing you the typical wiring for most single axle trailer and tandem axle trailers. For a large enclosed trailer with lots of running lights, consider a larger gage.
Trailer Wiring Diagrams for Single Axle Trailers and Tandem Axle Trailers. And here is the complementary mirror image with the trailer side connection Many times, trailer wiring is as easy as inserting the trailer plug into your vehicle's pre-rigged system. This is a basic reference article about trailer and caravan wiring; the plugs and sockets that are commonly in use in Australia, and the pin colour codes that are designed to coordinate proper connections, according to Australian Standards.
This accounts for three of the colors in the wiring harness.
The Trailer Wiring Diagram and Connector Application Chart.
At Trailer Superstore, we understand trailer wiring can be frustrating, and you may not know where to begin troubleshooting. Cut the four-pin plug off of the trailer harness. Good luck, let us know if it works.