7-Pin Plug/Trailer Lighting Problem
I was trying to trouble shoot a problem where my running/clearance lights weren't working when the license plate light bulb was plugged in. All my other lights were working fine and dandy. Because...
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Not doubting you, but your pin numbers and colors sound wrong compared to this diagram.
Link
Ignore the colors for a minute. Does your tow vehicle socket match the tow vehicle outside diagram (left picture) in the linked post? If not I would rewire it so that it does.
Then unhook all the wires from the plug on the trailer umbilical cord. and wire it up again to match the tow vehicle plug.
Also I don't think the center plug is used very often and wonder if you've accidentally wired something wrong there.
Link
Ignore the colors for a minute. Does your tow vehicle socket match the tow vehicle outside diagram (left picture) in the linked post? If not I would rewire it so that it does.
Then unhook all the wires from the plug on the trailer umbilical cord. and wire it up again to match the tow vehicle plug.
Also I don't think the center plug is used very often and wonder if you've accidentally wired something wrong there.
