Auto Headlamps Will Not Turn on

Test 1 - 2:

Test 3 - 8:

Test 9 - 10:

SYMPTOM
AUTO HEADLAMPS WILL NOT TURN ON

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

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