| BRAKE LAMP DOES NOT
ILLUMINATE |
1. Ineffective ground
circuit. |
1. Test and repair
open brake lamp ground circuit if required. |
| 2. Ineffective fuse. |
2. Test and replace
the fuse in the BCM if required. |
| 3. Ineffective
feed circuit. |
3. Test and
repair open brake lamp switch output circuit or stop lamp output circuit
if required. |
| 4. Ineffective
switch. |
4. Test and
replace brake lamp switch if required. |
| 5. Ineffective BCM
inputs or outputs. |
5. Use a diagnostic
scan tool to test the BCM inputs and outputs. Refer to the appropriate
diagnostic information. |
| BRAKE LAMP DOES NOT
EXTINGUISH |
1. Ineffective feed
circuit. |
1. Test and repair
shorted brake lamp switch output circuit or stop lamp output circuit
if required. |
| 2. Improperly
adjusted switch. |
2. Adjust
the brake lamp switch if required. |
| 3. Ineffective
switch. |
3. Test and
replace brake lamp switch if required. |
| 4. Ineffective BCM
inputs or outputs. |
4. Use a diagnostic
scan tool to test the BCM inputs and outputs. Refer to the appropriate
diagnostic information. |