Why is There 12 Volts on the Black Wire for my Trailer Connector

Published 08/03/2018

Question:

There is 12 v coming from the truck connector and also 12 v coming from the camper connector. Should there be 12 v on booth sides and should I connect them together. I guess that would make 24 v?

asked by: William

Expert Reply:

If you are referring to the 12 volt pin that is located in the 1 o'clock position on the 7-way trailer connector then there should be 12 volt power feeding from the vehicle to the trailer on that pin. This means that if you test the 12 volt wire (usually black) before it enters and exits the controller, there should be 12 volts on either side assuming the 12 volt wire on the trailer is ran to a battery for maintenance changing purposes. Attaching two 12 volt power wires together will not give you 24 volts.

I have attached our wiring help article for you as well.

expert reply by: Conner L