7 Way Round Plug Trailer Wiring Diagram. Trailer Wiring Diagrams showing you the typical wiring for most single axle trailer and tandem axle trailers. If you are rewiring your trailer completely, check out our trailer rewiring guide.
Plug and Play T-harnesses to connect to vehicle wiringTrailer wiring connectors, for both truck and trailer. If you are rewiring your trailer completely, check out our trailer rewiring guide. I put this here because I had a hard time finding and figuring this out for my trailers.
The plug I bought had yellow as the center aux color.
Find the trailer light wiring diagram below that corresponds to your existing configuration.
Not sure which wires attach to what on your trailer connectors? Wiring for the plugs is more or less standardized. The top countries of supplier is China, from.