Brake Switch Circuit

SYMPTOM
BRAKE SWITCH CIRCUIT

WHEN MONITORED
Ignition on.

SET CONDITION
Continuous brake applied signal after ignition turn-on and remaining with sensed speed above 37.5 mph (RWAL) or 15 mph (ABS) for over 10 seconds.

POSSIBLE CAUSES:
- Verify the concern
- CAB brake status
- Brake switch open
- Brake switch sense circuit open
- Brake switch ground circuit open
- CAB - internal concern