Brake Warning Indicator: Description and Operation

The "BRAKE" warning light goes ON to alert the driver that the parking brake is applied or that the brake fluid level is low. It also lights as a bulb test when the engine is cranked.

Parking Brake Switch
With the ignition switch in ON or START, battery voltage is applied to fuse 7 and to the "BRAKE" warning light. When the parking brake is applied, the parking brake switch closes and provides a ground for the light. The "BRAKE" warning light goes ON to remind the driver that the parking brake is applied.

Combination Valve Pressure Differential Switch
With the ignition switch in ON or START, battery voltage is applied to Fuse 7 and to the "BRAKE" warning light. The braking system is a split system designed so that one part will provide some braking action if there is a loss of brake fluid pressure in the other part of the system. If there is a loss of brake fluid pressure in either system, the combination valve pressure differential switch closes and provides a ground for the light. The "BRAKE" warning light goes ON to warn the driver that there is a loss of brake fluid pressure in the system. The combination valve pressure differential switch also provides a ground for the rear wheel anti- lock brake controller. See the Rear Wheel Anti-lock Brake System for further details. (Note: Check brake pad wear before adding fluid.)

Bulb Check
With the ignition switch in START, the "BRAKE" warning light is turned ON for a bulb check. See Indicators for further details.