6 Pin Trailer Connector Vs 7 Pin. With a six pin connector, the middle one is not used. Bought a new truck and found a different trailer lights plug on the truck.
Bought a new truck and found a different trailer lights plug on the truck. Seven-pin connectors are rarely used on trailers for local use. I had to put a new connector on my horse trailer.
These are listed below, with notes on significant deviations from them that can cause problems.
I had to put a new connector on my horse trailer.
With a six pin connector, the middle one is not used. The three additional pins are: trailer brakes, back-up lights and trailer battery charging. Verify the harness color codes at each tail light.
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