Gmc Sierra Third Brake Light Not Working

Hi i just bought a 2009 chevrolet silverado 1500.

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. 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. I noticed the third brake light is not working.

Chevy truck forum silverado sierra gmc truck forums. Lol i haven t located a bad fuse. I m hoping for an oddly named fuse or relay. I can not interpret fues box lables to check fuses.

The two bulbs under the dash do not. If at least one brake light works but one or two others don t troubleshooting is relatively easier than dealing with a circuit where none of the lights work. Other things use that ground when the key is on so its not strong enough then to activate the armature within the relay. 2003 gmc sierra 3500 6 0 v8 gas.

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. None of the lights come on when i open my doors. I checked the following fuses for current.

Feb 23 2014 3 08am. 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. The possible reasons for brake lights not working but tail lights are. Third brake light not working.

Interior fuses 12 stoplamps center high mounted stoplamp worked fine. Blown out light bulbs are the most common reason for why the brake lights not working but the tail lights are. My interior light and cargo light bulbs work. I m not sure if it s the switches in the door jamb a fuse or what.