Doors Fail to Lock/Unlock From Either Switch

Tests 1 - 3:

Tests 4 - 9:

Tests 10 - 12:

SYMPTOM
DOORS FAIL TO LOCK/UNLOCK FROM EITHER SWITCH

POSSIBLE CAUSES
- Door lock relay
- Fuse block fuse #17 open
- Fuse #17 B+ input open
- Fuse block fuse #4 open
- Fuse #4 B+ input open
- Fused B+ circuit from fuse #17 open
- Fused B+ circuit from fuse #4 open
- Door locks ground circuit open
- Door switch internal short
- Door lock relay output circuit open
- Door lock sense and unlock sense circuits shorted together
- Body control module