If only the third brake light or the lower two lights work start by checking the circuit fuses first.
Chevy colorado third brake light not working.
As the rear lights are not connected they do not illuminate.
The brake lights are not working on my 03 chevy s 10 already replaced bulbs replaced relay at brake pedal checked fuse all other lights work blinkers hazards third brake light at cab please tell me w read more.
When the fuse is blown it does not allow the circuit to complete.
Are they actuated by a separate switch than the 3rd light.
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.
A blue wire connects the brake lights switch to the rear lamps junction block.
Aug 20 2013 12 56am.
Chevy truck forum silverado sierra gmc truck forums.
Third brake light problem.
Third brake light problem.
The common causes the tail lights do not work are.
So i found out my third brake light was not working.
Third brake light problem.
The two white lights that illuminate the bed work fine however.
If all 3 brake lights are actuated by the same switch then i have another problem.
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.
Blow fuse the first thing the mechanics check is the fuse corresponding to the rear lights.
I changed the bulbs only to find out it still didn t work.
I thought the 2nd switch on the brake pedal was for cruise control.