Troubleshooting a Weak Right Stop/Turn Signal Circuit in the Bed of a 2002 Ford Super Duty

Question:

have plug in both bed and bumper. bed plug great. bumber plug right stop/emer has low voltage and does not power up trailer light. lights and wiring on trailer good. voltage appears to be half of what l side has. Dirty connection?

asked by: Steve

Expert Reply:

It very well could be a dirty connection or a short somewhere on the circuit. I would start at the back of the connector in the bed of your truck checking it for corrosion and then trace the circuit back checking for cut or exposed wire and fix as necessary.

I do think its most likely corrosion either on the front of the connector, the back of the connector or where it connects to the 7-way at the bumper.

I attached an FAQ article on trailer wiring that you might find informative also.

expert reply by: Jameson C