900 SE Hatchback L4-1985cc 2.0L DOHC Turbo EFI (1997)
Rheostat: Description and Operation
The instrument lighting is supplied with current (PWM voltage) from the rheostat via pin 2 (12p-2) of the main instrument display panel.
The frequency is between 56 and 90 Hz. The instrument lighting bulbs are grounded in the main instrument display panel.