Colorado 4WD L5-3.5L VIN 6 (2005)
Marker Lamp: Description and Operation
PARK, TAIL, MARKER, LICENSE, AND CLEARANCE LAMPS
The park, tail, marker, and license lamps are turned ON when the headlamp switch is placed in the PARK or ON position or anytime the headlights 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 requested ON, the BCM
energizes the park lamp relay. Current flow is from the park lamp relay to the individual park lamp circuit fuses and to their respective park, tail, marker,
and license lamps. The front park, marker, tail, and license lamps are grounded at G105. If the driver places the headlight switch in the ON position after
the ignition switch has been turned OFF, the park, tail, marker, and license lamps will remain ON until turned OFF or the battery runs dead.
