Diesel Data: Automotive Repair

Checking Brake Switch Sense

Tests 780 - 784:




Tests 785 - 786:





SYMPTOM
BRAKE SWITCH SENSE

POSSIBLE CAUSES
- Ground circuit open
- PCM connector terminal observable defect
- Brake switch defective
- Brake switch sense circuit open
- Brake switch sense circuit shorted to ground
- PCM defective (brake switch sense)