Courtesy Lamp: Description and Operation

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

The system inputs to the GEM/CTM are as follows:
^ The door open warning lamp switches. (Grounded when door is ajar; an open circuit when the door is closed.)
^ The Vehicle Speed Sensor (VSS) input. (Sinusoid Wave: 0.7V-20V, 2.2 Hz/MPH [1.37 Hz/km/h] [GEM only].)

The system output to the GEM/CTM is as follows:
^ The [1][2]interior lamp relay coil output. (Grounded when activated; open circuit when deactivated.)