No Response From Controller Antilock Brake

Tests 1 - 3:

Tests 4 - 7:

Tests 8 - 9:

SYMPTOM
NO RESPONSE FROM CONTROLLER ANTILOCK BRAKE

POSSIBLE CAUSES
- No response from CAB
- Replace fuse #27
- Controller antilock brake shorted to ground
- Fused ignition switch output circuit shorted to ground
- Junction block shorted to ground
- Ground circuit open
- Open fused ignition switch output circuit
- Open PCI bus circuit
- Controller antilock brake