Operating Light Control Rheostat does not Change Light Brightness: Description

The combination meter sub-assembly receives signals from this circuit to adjust the illumination of the meter. The combination meter sub-assembly sets the illumination level based on the user operation of the light control rheostat.

HINT: 

• The meter illumination level can be adjusted by operating the light control rheostat.

• The meter illumination dims when the light control switch is turned to the tail, head, or AUTO position at night.

• Setting the meter illumination to maximum brightness cancels the above dimming of the meter illumination.

• Setting the meter illumination to minimum brightness almost turns off (very dim) the meter illumination when the light control switch is changed to the tail, head, or AUTO position at night.