B - Brake Warning Indicator Always ON

B1- Brake Warning Lamp Test
NOTE: In a normal system, the brake warning lamp should only light when the ignition switch is in the "START" position or when the ignition switch in in "RUN" and the parking brake is applied.

- Release the parking brake.
- Check fluid level in reservoir. Fill as required.
- Turn ignition switch to "RUN".
- Turn ignition switch to "START".
- Does brake warning lamp turn "ON"?
YES - Go to B2.
NO - Go to B4.

B2- Brake System Leakage
- Check brake master cylinder reservoir sealing points and external brake system for leakage. Testing and Inspection
- Does system leak?
YES - Service as necessary, add fluid and bleed system.
NO - Fill brake master cylinder reservoir and go to B3.

B3- Brake Warning Switch Wiring
- Parially drain the brake master cylinder.
- Turn ignition switch to "RUN" and observe the brake warning lamp.
- Does the brake warning lamp illuminate?
YES - Fill brake master cylinder reservoir. Switch/wiring OK.
NO - Check for an open in brake warning switch to brake warning lamp wiring. Service as required. If no open is found, go to B4.

B4- Brake Warning Switch Check
- Manually push the float in the reservoir to the bottom.
- Turn the ignition switch to "RUN" and observe the brake warning lamp.
- Does the Brake warning lamp illuminate?
YES - Refill reservoir, brake warning switch OK.
NO - Replace brake master cylinder reservoir. Brake Master Cylinder