Additional All Doors Failing to Lock From Any Switch

SYMPTOM
ADDITIONAL ALL DOORS FAILING TO LOCK FROM ANY SWITCH

POSSIBLE CAUSES
- Fused B(+) circuit voltage too low at junction block
- Door lock relay control circuit from BCM fails
- Key - in ignition switch circuit to BCM defective
- Door lock relay does not operate
- Door lock relay coil resistance out of tolerance
- Door lock relay output shorted to ground
- Ignition switch defective
- Key - in ignition switch sense circuit shorted to ground