Yukon/Denali 4WD V8-4.8L VIN V (2005)
Clearance Lamp: Description and Operation
CLEARANCE LAMPS
The clearance lamps, are turned on when the headlamp switch is placed in the PARK or HEAD position or anytime the headlamps are requested. The
underhood fuse block supplies battery positive voltage to both the park lamp relay switch contacts and the park lamp coil circuit. The body control
module (BCM) provides a ground or control circuit to the park lamp relay coil circuit. When the park lamps are turned on the BCM energizes the park
lamp relay. Current flow is from the park lamp relay to the INT PRK 10 A fuse, and to the clearance and roof lamps. If the headlamp switch is left in the
ON position, the inadvertent power control feature will turn off the park, tail and clearance lamps approximately 10 minutes after the ignition switch is
turned to the OFF position. If the driver places the headlamp switch in the ON position after the ignition switch has been turned OFF, or if the ignition
switch is in the ACCY position, the park, tail and marker lamps will remain on until turned off or the battery runs dead.
