Courtesy Lamp: Description and Operation

When the driver places the dome lamp defeat switch in the OFF position, the courtesy lamps will be disabled. If an outside door handle is lifted or a door is opened, the courtesy lamps illuminate. After all the doors have been closed the courtesy lamps will remain illuminated approximately 10 seconds after the last door closes. The courtesy lamps will also turn on prior to any door being opened, and remain illuminated approximately 20 seconds when the driver removes the ignition key.

The CTSY fuse in the IP junction block, supplies battery positive voltage to the interior lamp control module. The control circuit of the interior lamp control module supplies ground to all interior courtesy lamps. When any door is opened or a courtesy lamp request input is received by the interior lamp control module, the interior lamp control module will illuminate the courtesy lamps.

The courtesy lamps will normally turn off after the doors are closed, or if the ignition switch is turned to either the ON or RUN position.