Operating Light Control Rheostat does not Change Light Brightness: Description

The meter CPU receives signals for adjusting illumination on the meter and instrument panel from this circuit. The meter CPU detects the illumination level selected by the user according to the position of the rheostat knob.

HINT: 

• The meter illumination level can be adjusted by turning the rheostat.

• The meter illumination dims when the light control switch is turned to the TAIL or HEAD position at night.

• Turning the rheostat knob fully clockwise cancels the above dimmer control.

• During light control switch TAIL or HEAD position, turn the rheostat knob fully counterclockwise, then the meter illumination turns off.