Interior Lighting Module: Description and Operation

Circuit A4 from fuse 1 in the Power Distribution Center (PDC) powers circuit M1 through the Ignition Off Draw (IOD) fuse in cavity 5 of the fuse block. Circuit M1 supplies power to the:
- Cargo lamp
- Dome/reading lamps
- Key-in lamp
- Left courtesy lamp
- Left door courtesy lamp
- Overhead console lamps
- Right courtesy lamp
- Right door courtesy lamp

Circuit M2 connects all of the above interior lamps to circuit Z1 through either one of the door jamb switches, liftgate switch, or liftgate glass ajar switch. With the vehicle not moving, when either the liftgate, liftgate glass or one of doors opens, these switches close connect circuits M2 and Z1. Circuit Z1 provides ground for the lamps.

If the vehicle is equipped with Remote Keyless Entry, the illuminated entry relay connects circuit M2 to ground on circuit M1.

Circuit Z1 also connects directly to the switches for the dome/reading lamps or if equipped, overhead console lamps.