The interior lamps system consists of 2 main features. The illuminated entry and a battery saver feature that will turn the interior lights off after 20 minutes if they are left on with all doors closed and the ignition off. The body control module (BCM) controls both of these functions. Battery power is supplied to the BCM from the BCM 2 10A Fuse in the underhood fuse block. The BCM 2 fuse supplies current to the BCM via CKT 1640. Battery power is supplied by the BCM through CKT 1732 to the dome lamp, map lamps, rear reading lamps, rear dome lamp, cargo lamp, glove compartment lamp, courtesy lamps and sunshade lamps. The BCM also controls the ground circuit side of the dome lamp and reading lamps for illuminated entry. The dome lamp and reading lamps will remain on for 20 seconds after the ignition key is removed and the last door is closed. In addition, if the vehicle is equipped with remote keyless entry (RKE), the dome and reading lamps will turn on, and stay on for 20 seconds after an UNLOCK signal is received from the keyless entry transmitter.

The reading lamps, dome lamp and map lamps can be turned on at any time by moving the appropriate switch to the ON position.

The rear dome lamp is fed battery voltage through CKT 1732 from the BCM, through the liftgate ajar switch, and is grounded through CKT 650 to the rear ground splice pack. The rear dome lamp will turn on when the liftgate is opened. The cargo lamp is fed battery voltage through CKT 1732 from the BCM, though CKT 744 and grounded through the decklid ajar switch.

The courtesy lamps are fed battery power through CKT 1732, and are grounded through CKT 745 (left front), CKT 747 (left rear), CKT 748 (right rear), CKT 746 (right front). These circuits will ground through the door jamb switches. the courtesy lamp will be illuminated when the affected door is opened. For example, when the right rear door is opened, the right rear door courtesy lamp will come on.

The dimming of the interior lamps is done through the dimmer switch, located on the left lower corner of the instrument panel. The dimmer switch is fed 5 volts from the BCM through CKT 1359, the voltage flows through the potentiometer of the dimmer switch, and back to the BCM through CKT 1381. The BCM receives this signal and controls the intensity of the interior lamps (via) CKT 8. CKT 8 feeds the dimming fuse in the left instrument panel fuse block which feeds the following components: traction/heated seat switch, fog lamp/heated seat switch, hazard switch, HVAC control head, I/P cluster, radio, electronic PRNDL module, and cigar lighter.

The headlamp switch must be in the PARK or Headlamp position in order for the interior lamps dimming feature to operate.