900 SE Hatchback L4-1985cc 2.0L DOHC Turbo EFI (1997)
Control Assembly: Description and Operation
Display and Illumination
Rheostat
The rheostat is connected to the ACC control module. The rheostat controls the background lighting for the pushbuttons.
Instrument Panel Lighting
A display panel lighting value is obtained from the SID. This value regulates the lighting intensity of the ACC panel's display. The same value also
regulates the mileometer display in the main instrument display panel and the SID's own display.