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What is Function of Center Pole on 7-Way Vehicle End Connector

Question:

what is the big pole for in center of the 7way round plug for

1

Helpful Expert Reply:

The center pole on the 7-way vehicle end connector is typically used to carry the signal from the reverse lights on the vehicle to the trailer. If your trailer does not have reverse lights, then the pin can be used for any purpose, such as an additional 12 volt circuit for accessories on the trailer.

I have attached a labeled image of a 7-way connector as well as an article on trailer wiring that you may find helpful.

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helpful expert reply by:
1
Chris R

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