Brake Warning Light

The brake warning light receives battery voltage with the Ignition Switch (X134) in position II. It is grounded by the Brake Fluid Level Switch (X111) when the brake fluid level is low. It may also be grounded through the Brake Fluid Level Switch (X111) and the brake fluid level switch diode when the Handbrake Switch (X191) is closed. The warning light is also grounded by the Anti-Lock Brake System ECU (Z108) or by the ABS Pressure Switch Unit (Z104) in the event of an ABS system problem. When the ignition switch (X134) is in position III. battery voltage is applied to the Brake Indicator Check Relay (K106). The relay is energized. applying ground to the brake warning light as a bulb check.