Brake Warning Indicator

Ground to light the BRAKE Indicator is provided in one of four ways. When the Ignition Switch is turned to Run, the Brake Pressure Modulator Valve (BPMV) provides a ground to the indicator for about two seconds through the TAN/WHT (33) wire. This indicates the Four Wheel Antilock Brake System (4WAL) is operating properly. If a malfunction occurs in the 4WAL system of the hydraulic portion of the antilock brake system, the BRAKE Indicator will light.

The BRAKE Indicator will light when the parking brake is set. This closes the Park Brake Warning Switch providing a ground to the BRAKE Indicator.

If a brake hydraulic circuit loses pressure, the Brake Pressure Warning Switch closes, providing a ground to the BRAKE Indicator.