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 right front and right rear inboard brake pads (B129, B135), and the handbrake diode (Z197) when the handbrake switch (X191) is closed. The warning light is also grounded by the ABS system ECU (Z108) or by the ABS pressure switch unit (Z104) in the event of an ABS system problem. When the right front or right rear inboard brake pad (B129, B135) is in need of replacement, the brake warning light is grounded through the right front or right rear inboard brake pad (B129, B135). The brake warning light is grounded by a 3 second timer as a bulb check.