Courtesy Lamp: Description and Operation

INTERIOR LIGHTING
The courtesy lights are controlled by the CTM. Body Control Module

The door switches are inputs to the CTM and the courtesy lights are outputs. The glove box lamp and the ash receiver lamp (if equipped) are not controlled by the CTM. They are hardwired to individual switches and fuses. The ignition key halo lamp is controlled by the CTM and will remain on for 30 seconds after the door is closed.

The highline CTM also provides for illuminated entry option. If the CTM detects an unlock signal from the RKE transmitter, a door disarm switch input or the door jamb switch input, the interior courtesy lights will be turned on. The illuminated entry function is canceled if the CTM senses an ignition "ON" condition or the "lock" command from a valid key fob.

If a door is left open or the dome lamp switch is left in the "ON" position for more than 15 minutes, the CTM will extinguish the lamps to avoid discharging the battery.