All Doors Fail to Lock

Test 1 - 4:

Test 5:

SYMPTOM
ALL DOORS FAIL TO LOCK

POSSIBLE CAUSES
- Door lock relay output circuit short to ground
- Decklid release relay output short to door lock relay output
- Decklid release relay output short to driver door unlock relay output
- Decklid release relay output short to door unlock relay output
- Remote keyless entry module - unlock ground open