Gmc Sierra Third Brake Light Not Working

If your third brake light works either way but the rear brake lights stop working when the truck is on its a faulty ground wire to the stop lamp relay.

Gmc sierra third brake light not working. Third brake light not working. I checked the following fuses for current. Lol i haven t located a bad fuse. None of the lights come on when i open my doors.

Other things use that ground when the key is on so its not strong enough then to activate the armature within the relay. I m not sure if it s the switches in the door jamb a fuse or what. My interior light and cargo light bulbs work. That s my next project.

Chevy truck forum silverado sierra gmc truck forums. Yes i need help brake lights work with doors open or closed with brake pedal on just the third brake light does not work when ignition is on and doors are closed. I think they are supposed to. Feb 23 2014 3 08am.

I noticed the third brake light is not working. The possible reasons for brake lights not working but tail lights are. The two bulbs under the dash do not. I can not interpret fues box lables to check fuses.

If electrical current is reaching the switch but the lights are not working even if the switch is in good condition follow the current flow with your test light to the stop lamps and look for a possible open or short in the circuit. I m hoping for an oddly named fuse or relay. Hi i just bought a 2009 chevrolet silverado 1500. 3rd brake light and cargo lights not working.

Remove the screws from the bulb lens which you can access through the trunk or see your vehicle repair manual to get the exact location. A blue wire connects the brake lights switch to the rear lamps junction block. If only the third brake light or the lower two lights work start by checking the circuit fuses first. 2003 gmc sierra 3500 6 0 v8 gas.