Front Courtesy Lamps Output Shorted

Tests 1 - 3:

Test 4:

SYMPTOM
FRONT COURTESY LAMPS OUTPUT SHORT

WHEN MONITORED
Anytime the Body Control Module is active.

SET CONDITION
When the voltage of the Headlamp Switch MUX Return Circuit falls below 5.0 volts for 10 seconds.

POSSIBLE CAUSES
- Headlamp switch MUX return circuit short to ground
- Courtesy lamps driver circuit open
- Panel lamps dimmer signal circuit open
- Body control module
- Headlamp switch