Courtesy Lamp: Description and Operation

PRINCIPLES OF OPERATION

The generic electronic module (GEM) illuminates the interior lamps when an unlock signal is received from the central security module. The illuminated entry feature will be canceled when any of the following conditions are met:
- 25 seconds have elapsed since the illuminated entry feature was activated and the interior lamp control is not activated (door ajar or courtesy lamp switch on).
- The GEM receives a request from the central security module (remote transmitter lock button pressed) and the interior lamp control is not activated.
- The ignition is in the RUN or START position and the interior lamp control is not activated.

The GEM will illuminate the interior lamps when any door is open or ajar. The interior lamps are the following: the interior dome lamp, the cargo lamps, the door courtesy lamps and the interior lamps. The courtesy lamps will shut off when the doors are closed and the illuminated entry feature is not active or when the vehicle speed is greater than 5 mph (8 km/h). The interior lamps will not be reactivated until vehicle speed is less than 3 mph (5 km/h) and a new door open warning lamp switch signal is received.

The GEM controls the interior lamps illuminated entry function by activating the interior lamp relay.

The relay is activated by applying ground to the relay coil and is deactivated by removing the ground signal.

The panel dimmer switch is integrated into the headlamp switch and controls the interior lamps by activating the interior lamp relay.

The central security module sends a signal to the GEM on the illuminated entry request circuit to indicate a request to turn the illuminated entry feature on or off.

The GEM controls the running board lamp using the interior lamp relay through the application or removal of ground potential at the GEM interior lamp relay control output. When the interior lamp relay is activated, battery potential is provided to the running board lamps.

The following lamps will be shut down 45 minutes after key-off if activated by door ajar switch through the GEM:

NOTE: If any of the following lamps are turned on manually they will remain on until the switch is turned off manually.
- driver door courtesy lamp
- passenger door courtesy lamp
- interior dome lamp
- cargo lamps
- interior lamps