7 Pin Trailer Female Wiring Diagram. I hope this helps some folks, because it's pretty tough finding this online. This is the style we recommend.
Does this pin have power normally on these trucks? Anyone have a diagram of which pins supply which functions? I found a diagram on the web (see attached), but can't tell if the diagram is from the front or rear of the connector - ie if you unplugged it at looked at the side that mates with.
Refer to your trailer service manual and plug installation instructions to avoid wiring problems that may damage your trailer, brake controller or vehicle!.wiring diagram there.
Test each pin on the truck side for the lights not working on the trailer.
If so, does it have power when the ignition is off, or only when on? Regardless of wire color, the pin position for function is pretty standard. Trailer wiring is very important to towing safety.
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