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What Is The Purpose Of 12V Power On Trailer Connector For Fifth Wheel Trailer

Question:

what is the 12volt power wire for in a trailer plug? I have a 5th wheel and I would like to know why I need power going to trailer while towing

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Expert Reply:

The 12V power pin on the 7-way connector for your fifth wheel is used for maintaining a charge on the trailer battery or auxilliary power.

I have attached a helpful article that explains what each of the wires on a trailer connector functions are you can check out.

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Jeffrey L

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