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All Doors Fail to Lock From Any Switch

Test 1 - 4:




Test 5 - 6:






SYMPTOM
ALL DOORS FAIL TO LOCK FROM ANY SWITCH

POSSIBLE CAUSES
- Door lock relay output circuit shorted to ground
- Key-in ignition switch shorted
- Key-in ignition switch sense circuit shorted to ground
- Central timer module - door lock open
- Central timer module - key-in ignition switch shorted

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