The courtesy lights are composed of the following lamps:

The courtesy lights operate under the following conditions:

The dome lamp and the inside rearview mirror reading lights receive voltage continuously from fuse 28 through circuit 240. The dome lamp and the inside rearview mirror reading lights receive ground from the headlamp switch through circuit 156.

The headlamp switch grounds circuit 156 when any door lock grounds circuit 49, or when receiving a voltage signal from the instrument panel dimmer switch. The door lock (of the corresponding open door) grounds circuit 49, when a door is open. When the instrument panel dimmer switch is in the DOME position, the switch sends a voltage signal to the headlamp switch. The inside rearview mirror reading lamps have 2  switches. These switches, one for each light, allow individual light operation anytime. These switches provide ground to their corresponding light through circuit 150, when turned to the ON position.

The headlamp switch has a timer.

The timer turns OFF the dome lamp and the inside rearview mirror reading lights (by opening circuit 156) under the following conditions:

Ensure that the inside rearview mirror reading lights switches are turned OFF in order to avoid draining the battery. The inside rearview mirror reading lights switches are not covered by the battery rundown protection.

The headlamp switch controls the sustained interior lighting feature. The headlamp switch keeps the courtesy lights ON for 16 seconds, gradually dimming OFF after all the vehicle doors are closed and the ignition switch is in the OFF position. The sustained interior lighting is canceled when the ignition switch is turned to the RUN or START position during the 16 second interval.

The remote control door lock receiver turns ON the courtesy lights (by grounding circuit 49) for 38-42 seconds when the vehicle doors are unlocked by a keyless entry transmitter (if equipped). This confirms a remote door locking.

Anytime the instrument panel compartment is open, the instrument panel compartment lamp illuminates. The instrument panel compartment lamp receives voltage at all times from fuse 28 through circuit 240. The instrument panel compartment lamp receives ground from the instrument panel compartment lamp switch through circuit 175. The instrument panel compartment lamp switch closes with the instrument panel compartment open, turning ON the instrument panel compartment lamp. Ensure that the instrument panel compartment is closed in order to avoid draining the battery. The instrument panel compartment lamp is not covered by the battery run down protection.

Anytime the rear compartment lid is open, the rear compartment lamp illuminates. The rear compartment lamp receives voltage at all times from fuse 28 through circuit 240. The rear compartment lamp receives ground from the rear compartment lid ajar switch through circuit 744. The rear compartment lid ajar switch closes with the rear compartment lid open, turning ON the rear compartment lamp. Ensure that the rear compartment lid is closed in order to avoid draining the battery. The rear compartment lamp is not covered by the battery rundown protection.