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: 

• This model is equipped with an Optitron meter, therefore the meter illuminates even in the daytime.
• 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/HEAD position, turn the rheostat knob fully counterclockwise, then the meter illumination turns off.