Brake Switch Circuit

Symptom
BRAKE SWITCH CIRCUIT

When Monitored: Ignition On - Continuously

Set Condition: When the brake lamp switch and brake switch outputs are both open or shorted.

POSSIBLE CAUSES
- INTERMITTENT BRAKE SWITCH CIRCUIT DTC
- BRAKE SWITCH CIRCUIT DTC PRESENT
- BRAKE LAMP SWITCH STATUS
- BRAKE SWITCH STATUS
- FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
- BRAKE SWITCH OUTPUT CIRCUIT/BRAKE LAMP SWITCH OUTPUT CIRCUIT SHORT TO VOLTAGE
- BRAKE SWITCH OUTPUT CIRCUIT/BRAKE LAMP SWITCH OUTPUT CIRCUIT SHORT TO GROUND
- BRAKE SWITCH OUTPUT CIRCUIT/BRAKE LAMP SWITCH OUTPUT CIRCUIT OPEN
- BRAKE SWITCH OUTPUT CIRCUIT/BRAKE LAMP SWITCH OUTPUT CIRCUIT SHORTED TOGETHER
- BRAKE LAMP SWITCH FAILURE
- BRAKE SWITCH FAILURE
- CAB FAILURE

Test 1:

Test 2 - Test 6:

Test 7 - Test 10:

Test 11:

BRAKE SWITCH CIRCUIT