Trailer Plug Adapter Wiring Diagram. The top countries of supplier is China, from which. Plugs (trailer side) and sockets (vehicle side) are available in all standard formats and can be spliced into your existing tow wiring.
Determine which color wire supplies constant power to the ignition switch.
And the trailer plug on the back of your truck doesn't remotely match the one on the trailer.
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The trailer wiring diagrams listed below, should help identify any wiring issues you may have with your trailer. Trailer wiring is very important to towing safety. I can't even find where the plug is in the wiring diagram in the tractor manual, so I have no idea what the function of the pins are.