Colorado 4WD L5-3.5L VIN 6 (2005)
Courtesy Lamp: Description and Operation
COURTESY LAMPS
The courtesy lamps include the reading lamps, footwell lamps, cargo lamp, and dome lamps. The cargo lamp, footwell lamps, and dome lamp may be
manually turned ON or OFF by placing the interior lamp switch in the ON or OFF position. When the driver places the dome lamp defeat switch in the
OFF position, these courtesy lamps will be disabled. If a door is opened, the courtesy lamps, except the cargo lamp unless activated, will illuminate.
After all the doors have been closed, the courtesy lamps will remain illuminated approximately 15 seconds after the last door closes. The courtesy lamps
will also turn ON prior to any door being opened and will remain illuminated approximately 40 seconds when the driver removes the ignition key. The
body control module (BCM) will immediately turn OFF the courtesy lamps if a door lock command is received with all of the doors closed, or if the
ignition switch is turned to either the ON or RUN position. Individual power and ground circuits to each lamp are supplied by the BCM except for the
cargo lamp ground which is grounded at G105.
The cargo lamp on the vehicle exterior is supplied voltage by a dedicated courtesy lamp supply voltage circuit. Cargo lamp operation can controlled by a
push-button switch on the instrument panel (I/P) that sends a momentary ground signal to the BCM. The BCM will then illuminate the cargo lamp only
while the courtesy lamps are illuminated.
