F 350 4WD Pickup V8-351 5.8L VIN H EFI (1997)
Dimmer Switch: Description and Operation
The light switch rheostat resistor is part of the headlamp switch. Rotate the headlamp switch knob and shaft clockwise to dim the instrument panel
illumination.
To turn on the dome lamp, rotate the headlamp switch knob and shaft fully counterclockwise.
