No Response From Controller Antilock Brake

Test 1 - 3:

Test 4 - 7:

Test 8 - 9:

SYMPTOM
NO RESPONSE FROM CONTROLLER ANTILOCK BRAKE

POSSIBLE CAUSES
- No response from cab
- Replace fuse # 19
- 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