Rear Window Defogger Inoperative (ATC)

Test 1 - 3:

Test 4 - 9:

Test 10 - 11:

SYMPTOM
REAR WINDOW DEFOGGER INOPERATIVE W/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 CKT open
- Rear window defogger relay control circuit open
- Rear window defogger relay output short to ground
- Fused (B+) short to ground
- Fused B(+) circuit open
- Body control module - rear defogger relay control open
- ATC head-rear defog switch