All Doors Fail to Lock and Unlock From One Switch

Test 1:

Test 2:

SYMPTOM
ALL DOORS FAIL TO LOCK AND UNLOCK FROM ONE SWITCH

TEST NOTE
This symptom is diagnosed using the test ALL DOORS (EXCEPT DRIVER W/RKE) FAIL LOCK/UNLOCK FROM ANY SWITCH.

POSSIBLE CAUSES
- Defective door lock switch
- Defective unlock switch