All Doors Fail to Lock and Unlock From One Switch

Tests 634 - 638:

Test 639:

SYMPTOM
* ALL DOORS FAIL TO LOCK AND UNLOCK FROM ONE SWITCH

POSSIBLE CAUSES
- Door lock switch open
- Door lock switch fused B(+) CKT open
- Door lock switch output CKT open
- Door lock switch output voltage too high
- Door lock switch voltage too high
- Intermittent symptom selected