Interior Courtesy Lamp/Power Sunroof Control Switch
The courtesy lamp is located on the 
headliner above the rearview mirror. The lamp switch is located on the left side of the lamp/switch assembly and has three positions. If the switch is in the center position, the lamp will go on whenever a door is opened and go off when the door is closed. In the forward position, the lamp will stay on until it is turned off. In the rear position, the lamp will not come on, even when a door is opened.