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The trailer has a 7 pin female plug and is wired corectly. I put a male plug on my ford using the the three wires for lights and it works fine. When I try to do the same on my 87 suburban the olnly thing that works correctly is the left turn signal. When I turn on the right signal all the lights flash. When I turn on the running lights and try the turn signals all lights flash and when I hit the brakes all lights go out. Any suggestions other than get rid of the suburban? |