Keyless Entry Unlock Illumination

The Body Control Module (BCM) grounds circuits 156 and 157 for 36-44 seconds, turning on the courtesy lights, when the following conditions are met:
^ The ignition switch is in the LOCK position.
^ All vehicle doors are closed.
^ IP dimmer switch is off.
^ The BCM receives a message from the Remote Control Door Lock Receiver (RCDLR) to unlock the doors.