Brake Lamps
WARNING: This page is about a different variant/trim than selected.
| CONDITION | POSSIBLE CAUSES | CORRECTION |
|---|---|---|
| BRAKE LAMP DOES NOT ILLUMINATE | 1. Ineffective or missing bulb. | 1. Test and replace brake lamp bulb if required. |
| 2. Ineffective ground circuit. | 2. Test and repair open brake lamp ground circuit if required. | |
| 3. Ineffective fuse. | 3. Test and replace the fuse if required. | |
| 4. Inspect power and ground at the switch. | 4. Verify power and ground to the switch. Repair as needed. | |
| 4. Ineffective feed circuit. | 4. Test and repair open brake lamp switch output circuit or stop lamp output circuit if required. | |
| 5. Ineffective switch. | 5. Inspect, test and replace brake lamp switch if required. Review graphic shown below for proper tab alignment. | |
| 6. Ineffective BCM inputs or outputs. | 6. 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. Ineffective brake lamp switch. | 2. Test and replace brake lamp switch if required. Review graphic shown below for proper tab alignment. | |
| 3. Ineffective BCM inputs or outputs. | 3. Use a diagnostic scan tool to test the BCM inputs and outputs. Refer to the appropriate diagnostic information. |
NOTE:
If damage to the switch is present for any reason the switch is to be replaced. If a switch is removed and the plunger length differs from a new switch, the switch should always be replaced and not reinstalled. The nominal height for a new switch (tip of the plunger to the body of the switch) is 16.90mm.
- 1 - Defective brake switch due to the switch tab being sheared off.
- 2 - Defective brake switch due to the switch tab being offset.
- 3 - Normal operational brake lamp switch to be used for installation.