Rear Window Defogger Inoperative (ATC)

Test 1 - 3:

Test 4 - 8:

Test 9 - 11:

SYMPTOM
REAR WINDOW DEFOGGER INOPERATIVE WITH ATC

POSSIBLE CAUSES
- Rear defog operates OK
- Defogger grid ground circuit open
- Rear window defogger grid open
- Rear window defogger relay-open
- Rear defogger relay output circuit open
- Rear window defogger relay control circuit open
- Rear window defogger relay output shorted to ground
- Fused B+ circuit open
- Fused B+ shorted to ground
- Body control module - rear defogger relay control open
- ATC head-rear defog switch