Auto Headlamps Will Not Turn On

SYMPTOM
AUTO HEADLAMPS WILL NOT TURN ON

TEST NOTE: This symptom is diagnosed using the test AUTO HEADLAMPS WILL NOT TURN OFF.

POSSIBLE CAUSES
- Ultralight sensor sign SHT to ground
- Ultralight sensor signal open
- Auto headlamp sensor CKT shorted
- Automatic HDLMP light sensor open
- BCM ultralight sense shorted
- BCM ultralight sense open
- Headlamp switch function