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7-Way Molded Trailer Wiring For Trailer End To Match Up With 7 Blade Adapter On Vehicle

Question:

Is the blade width on 7 way receptacle different on different receptacles? I have a 4 way to 7 way and 4 way receptacle and the blades don’t fit into the connector that is on my boat. The blades on receptacle are to wide.

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Expert Reply:

Some harnesses are different and will not match up correctly with the adapter on your vehicle. I would recommend cutting off the head of the 7 way plug on your trailer and installing The 7-Way Molded Trailer Wire Connector # H20042.

This harness is a trailer end connector with a 3 foot lead. I attached a wiring diagram below of which wire goes where and the function of each wiring.

I attached an installation video link below.

Wiring Functions
Wiring Functions
(click to enlarge)
expert reply by:
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Noah E

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