5 To 4 Trailer Wiring. We recommend these standards because they are pretty universal. Check for corrosion in the trailer's bulb socket.
Our team of professionals is here to help you learn how to locate the problem and understand how to perform different tests. Turn on headlights, taillights and flashers. That said, for specific situations, there are industrial standards with different connectors and wire arrangements.
Of course, if you already HAVE a trailer wiring kit installed and it works fine, then you're golden.
If the running lights work there's not really much else you can do wrong.
A number of standards prevail in North America, or parts of it, for trailer connectors, the electrical connectors between vehicles and the trailers they tow that provide a means of control for the trailers. We recommend these standards because they are pretty universal. In my case, I did have the OEM trailer wiring kit; but somehow the ground for the system broke.