Bus (+/-) Signals Open/No Response From BCM

Tests 1 - 3:

Tests 4 - 5:

SYMPTOM
BUS +/- SIGNALS OPEN OR NO RESPONSE FROM BODY CONTROL MODULE

POSSIBLE CAUSES
- Attempt to communicate with another module
- Fused (B+) CKT open
- Open ground circuit(s)
- Open PCI bus circuit
- Body control module