Brake Fluid Level Sensor/Switch: Testing and Inspection
DIAGNOSIS AND TESTING - RED BRAKE WARNING LAMPThe red warning lamp illuminates when the parking brake is applied or when the fluid level in the master cylinder is low. It will also illuminate at start up as part of a bulb check.
If the light comes on, first verify that the parking brakes are fully released. Then check pedal action and fluid level. If a problem is confirmed, inspect the brake hydraulic system for leaks.
A red warning lamp with an amber warning lamp may indicate a electronic brake distribution fault.