Driver Door Key Fails to Arm or Disarm VTSS

Test 1 - 4:

SYMPTOM
DRIVER DOOR KEY FAILS TO ARM OR TO DISARM VTSS

POSSIBLE CAUSES
- Fused B+ open
- Driver cylinder lock switch MUX circuit shorted to ground
- Driver cylinder lock switch MUX circuit open
- Driver cylinder lock switch
- BCM-VTSS won't arm or disarm with door key