No Response From Automatic Temperature Control Module

Test 1 - 4:

Test 5 - 6:

SYMPTOM
NO RESPONSE FROM AUTOMATIC TEMPERATURE CONTROL MODULE

POSSIBLE CAUSES
- Attempt to communicate with the BCM
- Ground circuit open
- Fused (B+) CKT open
- Fused RUN relay output circuit open
- Open PCI BUS circuit
- Automatic temperature control module