Headlamp Switch Open Circuit

Test 1 - 3:

Test 4:

SYMPTOM
HEADLAMP SW OPEN CKT

WHEN MONITORED
Ignition in RUN and IOD fuse/connector installed.

SET CONDITION
This DTC sets if the BCM detects voltage on the MUX circuit above 4.8 volts.

POSSIBLE CAUSES
- Headlamp MUX volts > 4.9
- Headlamp switch MUX open
- Headlamp switch return open
- BCM headlamp MUX