Courtesy Lamp: Description and Operation

COURTESY/ILLUMINATED ENTRY LAMPS
The courtesy lamp high control circuit supplies voltage to the courtesy lamps and cargo lamps. The lamps are illuminated when they receive a battery positive voltage from the courtesy lamp high control circuit of the body control module (BCM). The BCM will supply voltage to the courtesy lamp high control circuit for illuminated entry under the following conditions:
- The ignition is in the LOCK position.
- The I/P dimmer switch is in the door position.
- The door jamb input transitions to an active state (opening a door).
- The use of the RKE to unlock the side doors

When the driver uses the remote function actuator transmitter to unlock the doors, the BCM will illuminate the courtesy lamps for approximately 40 seconds, unless another BCM function causes the lamps to remain active. If the ignition switch is turned to either the RUN or START position, the courtesy lamps will turn OFF immediately.

When the door latch switch signal circuit is active with the ignition in the OFF position, the BCM will illuminate the courtesy lamps. The courtesy lamps will remain illuminated for approximately 25 seconds after the door latch switch signal circuit becomes inactive, unless another BCM function causes the lamps to remain active. If the ignition switch is turned to either the RUN or START position, the courtesy lamps will turn OFF immediately.

COURTESY/ILLUMINATED EXIT
The illuminated exit feature will activate the courtesy lamps when the KEY IN input of the BCM transitions from an active state to an inactive state (removing the ignition key). When the key is removed from the ignition, the KEY IN input to the BCM becomes inactive. The BCM will illuminate the courtesy lamps for approximately 25 seconds, unless another BCM function causes the lamps to remain active.

COURTESY LAMPS MANUAL OPERATION
The courtesy lamps, may be manually operated by the I/P dimmer switch. When the I/P dimmer switch is placed in the ON position, the BCM receives a ground signal from the courtesy lamps ON switch signal circuit. Upon receiving the courtesy lamp switch signal, the BCM then applies battery positive voltage to the courtesy lamp high control circuit, which illuminates the courtesy lamps. The interior lamp switch will override any BCM operation of the interior lamps, such as entry illumination.

ROOF RAIL READING LAMPS
The roof rail reading lamps receive voltage on the inadvertent power courtesy lamp circuit, and are turned ON by the individual switch on the lamp assembly.

COURTESY/READING LAMPS
The courtesy/reading lamps receive voltage in 2 ways. The reading lamps receive voltage on the inadvertent power courtesy lamp circuit, which has voltage any time the BCM is awake, and are turned ON by the individual switch on the lamp assembly. The courtesy lamps receive voltage on the courtesy lamp high control circuit, controlled by the BCM.