Dimming Module

Circuit 352 from fuse 24 in the fuse block powers the dimming module. Circuit L90 from the headlamp switch feeds circuit 352 through fuse 24 when the headlamp switch is in the the PARK, LOW, or LOW/FOG position. Circuit 366 from fuse 12 in the fuse block supplies power to the headlamp switch for circuit L90. Circuit A6 from fuse 10 in the Power Distribution Center powers circuit 366 through fuse 12.

Circuit 52 from dimming switch connects to the dimming module. The dimming module determines the level of illumination selected from the input it receives on circuit 52.

The dimming module powers the illumination lamps on circuit E2. Circuit E2 splices to supply power to the following illumination lamps:
- Ash receiver lamp
- Cigar lighter lamp
- Headlamp switch lamps
- Radio lamp
- Instrument cluster general illumination lamps
- A/C heater control switch lamp
- Transmission range indicator lamp
- Transfer case range indicator lamp
- Heated rear window switch lamp
- Overdrive switch lamp
- Graphic display module illumination lamps
- Automatic temperature controls lamp
- Overhead console illumination lamps

Circuit Z1 provides ground for all of the illumination lamps except for the automatic temperature controls lamp and A/C Heater switch lamp. Circuit Z4 provides ground for the automatic temperature controls lamp. The A/C Heater switch lamps is case grounded.

Additionally, the headlamp switch lamps also ground when the courtesy lamp switch is closed. When closed, the courtesy lamp switch connects the headlamp switch lamps to circuit M2.