Headlamps Will Not Turn Off

SYMPTOM
* HEADLAMPS WILL NOT TURN OFF

POSSIBLE CAUSES
- No response (BCM) - CCD bus failure
- Headlamp switch sense circuit shorted to ground
- Headlamp relay control circuit shorted to ground
- Low beam relay control circuit shorted to ground
- Low beam relay control circuit (QUAD) shorted to ground
- Low beam headlamp relay (QUAD) defective, shorted
- Low beam headlamp relay defective (shorted) by default
- PDC defective (low beam headlamp relay connector shorted)
- Headlamp switch defective - switch sense
- BCM defective (headlamp switch sense function) by default
- BCM defective (low beam relay control shorted) by default