Troubleshooting 12V Power Circuit on 7-Way on 2008 Chevy Silverado 2500 Duramax

Updated 06/07/2017 | Published 06/05/2017

Question:

I have a 2008 chevy Silverado 2500 duromax. I am not getting aux power to the plug in the bumper. I have power at the pole infant of the fuse box. Is there a fuse in the line somewhere?

asked by: Gene

Helpful Expert Reply:

Under the hood of your 2008 Chevrolet Silverado there is a connection required for activating the 12V auxiliary power feed on the 7-way. The ring terminal for the 12-volt power lead for the 7-way trailer connector is located to the left of the power distribution box. It is taped to a wire harness under the power brake booster. Cut the tape to release it from the harness. Then run the wire to the front of the power distribution box and hook the ring on the right post. You can refer to the linked article that covers this process.

If the 12V circuit has worked previously but has now stopped you may have a corrosion issue inside the 7-way socket or in the connector that plugs into it. Check both for any signs of discoloration, corrosion or trapped dirt or water that could be causing a short-circuit of the trailer power feed.

expert reply by: Adam R