The interior lighting consist of the dome lamp.

The dome lamp, may be manually turned on or off by placing the interior lamp switch in the ON, DOOR or OFF position. When the driver places the dome lamp switch in the ON position, the dome lamps will remain on. When the driver places the dome lamp switch in the DOOR position, and a door is opened, the dome lamp will illuminate. When the driver places the dome lamp switch in the OFF position, the dome lamp will be disabled.

A circuit breaker in the instrument panel (IP) supplies battery positive voltage to the dome lamp switch. A normally open door jamb switch provides a ground circuit when a door is opened. A diode module is used to prevent a voltage feed back from the turn/hazard switch. If the dome lamp switch is placed in the ON position, the dome lamp will remain on until turned off or the battery runs dead.

The second group includes lamps which may be dimmed:

A circuit breaker in the instrument panel (IP) supplies battery positive voltage to both the taillamp relay coil circuit and switch circuit. When the driver places the headlamp switch in either the PARK or HEADLAMP position, the taillamp relay is energized. The taillamp relay coil circuit is grounded through the headlamp switch at G105. When the taillamp relay is energized battery positive voltage is supplied to all lamps in the dimming circuit. When the driver selects a dimming setting by moving, the IP dimming switch potentiometer, all incandescent back lighting lamps are provided with a specific voltage. The incandescent back lighting lamps are then grounded at G105.

Driver controls include the following components:

Two modules process the inputs and the controls: