Troubleshooting Brake Controller Installed in 2005 Chevy Silverado that Only Works w Override Lever

Question:

The brake controller worked for years then noticed last tow no trailer braking with pedal depressed.. Checked power with pedal depressed 0 volts. manual brakeslider work normally. Brake light on truck work normally. Confirmed with another known good trailer, same result. Removed adapter cable from truck to controller and checked for power, 0 volts with pedal depressed. Checked fuses. What am I missing?

asked by: Robert T

Helpful Expert Reply:

Since your tow vehicle is a Chevy truck your problem is going to be a blown third brake light fuse. When the brake controllers installed in a Chevy truck stop working only with the brake pedal it's because the third brake light fuse is blown and that circuit also goes to the brake controller wiring.

expert reply by: Jameson C