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Trailer and Vehicle Side 7-Way Wiring Diagrams  

Question:

i have a 7 way plug on my f-550 but on my goose neck trailer with elec. breaks i have 5 wires goin to it would u send me a diagram how to wire it up right

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Expert Reply:

The 7-way on your trailer could be wired correctly as-is. Not all 7-ways will have wires run to every one of the pins. Typically, if there are only 5 wires you will be missing the circuits will be the 12-volt accessory and the reverse light circuit.

I attached a couple pictures that show how trailer side and vehicle side 7-ways wire as well as an FAQ article on trailer wiring

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Jameson C
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