Brake Warning Light
- Brake warning light should only come on when ignition is in start position or when ignition is on with parking brake applied or fluid level low. On diesel vehicles, brake warning light should also come on when vacuum is low.
- If brake warning light does not come on when brake fluid is low, manually push reservoir float to bottom of reservoir. If light still does not come on, check circuit fuse, wiring and bulb. Repair as necessary. If bulb and related circuitry are okay, replace reservoir assembly.
- If brake warning light does not come on when parking brake is applied, check parking brake switch, circuit wiring and bulb. Repair as necessary. With parking brake released and master cylinder reservoir full, turn ignition on. If warning light is on, check for shorted, grounded or defective warning switches or wiring. Repair as necessary. Turn ignition to start position. If brake warning light does not come on as a bulb check function, check fuse, bulb and wiring. Repair as necessary.