Diagram Four Pin Trailer Wiring. Trailers that use this are usually fairly light weight and don't have. The first step in wiring your trailer cables is to ground the white cable first.
The wiring and pin connection are on the ballast label in the form of a diagram. So this means your trailer wiring plug will need at least four contacts. There should be a common color for both the tail lights.
The first step in wiring your trailer cables is to ground the white cable first.
But wiring a trailer may not be easy.
In the North American market it is very common for brake lights and turn signals to be combined. There should be a common color for both the tail lights. I drew this crude diagram to help explain.
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