Daewoo MUSSO Service Manual page 1405

Function
When ignition switch is turned ON, green lamp on auto dimming
mirror will turn in and glare reflection ratio will be automatically
adjusted. By positioning AUTO switch to ON, 2Sensors will
automatically adjust refection ratio after sensing rear and
surrounding brightness to reduce driver's eye fatigue during
driving though tunnel or in night.
When OFF switch is pressed, the lamp goes out and it will be
operated as a normal rear view mirror and shift lever is
positioned in reverse, the auto dimming function will be
automatically OFF.
Specifications
Voltage Rating
Operating Current
Over Current
Check & Service
If reflection ratio is not adjusted automatically during night
driving when AUTO switch is pressed, check each connectors
for proper connection and power flow to the auto dimming room
mirror using multi tester.
1. Yellow (Connected to back-up lamp)
2. Blue (Ground)
3. White (Power)
DV 12V
1 A
3 A
GLASS AND MIRRORS 9L-13