Brake Fluid Level Sensor/Switch: Testing and Inspection

Not Illuminated When Fluid Level Low (Active High)

1. Check fluid in fluid reservoir is within normal level limits and top up if necessary.
2. Check continuity across sensor pins, short circuit indicates acceptable fluid level, open circuit indicates low fluid level.
3. Check voltage at pin 10, 48-way connector. A value of approximately 0 V indicates signal healthy i.e. lamp off, 12 volts indicates fault condition i.e. lamp on.

Brake Fluid Low Level Indication, Fig.1:

1. Instrument pack
16. Brake fluid level indicator