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When I got my truck 3.5 years ago, it was wired for trailer and it had a 6 pole square. Now I have seen lots of different trailer wirings over the years, (4 flat, 4 round, 6 round, 7 etc.) and I have seen adapters for all of these but never for a 6 square. It doesn't really matter because I wired in a 4 flat, but I was wondering if anyone knows what type of trailer took a 6 square because I have never seen one with it. My guess is either some sort of agricultural equipment or maybe a home made trailer. Does anyone know what the 6 square is for?
I realize that a lot of trailers use 6 prong, but usually I have seen 6 prong round. I know that it probably is the same wiring (ie Green-right turn, Red-auxiliary, Blue-electric brakes, White-ground, Yellow-left turn, Brown-tailights), just with a square plug, but I never see trailers with 6 square plugs. Do horse trailers have the 6 square?
Look at it again. Make sure it isn't one of those U-Haul connectors. On those, one side has the standard flat-4. The other side has 3 holes for the U-Haul type individual wire connectors.
Probably too obvious so probably wrong but what the hey.
Are you sure it isn't the standard Ford style connector? My 94 F250 came factory wired for towing and it had a big round plastic connector on a square plastic housing. The connector has 6 flat, Spade like male pins set in a circle around the center post which is a two pronged flat connectors to accept a big fat round pin from the trailer. The reason I mention this is that the spade connectors are kind of rectangular which some people might say if kind of square, and the housing is square. A stretch I know but thought I would throw this in.
If it is this connector it is pretty common and has the usual, brakes, lights, turn, aux battery etc.