What is a 7 pin trailer connector? - AskingLot.com
2020-5-31u2002·u2002The 7-Way Trailer Plug is around 2″ diameter connector that allows an additional pin for an auxiliary 12-volt power or backup lights. It is usually used for towing a heavy-duty landscaping trailer, car trailer, equipment trailer, horse trailer, dump trailer, travel trailer, construction trailer, and larger trailers.
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