Keyless Entry Unlock Illumination

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