Today's second question, Auto Dimming Mirror

TheGryme

New member
Nov 10, 2020
22
1
3
SoCal Mountains (Wrightwood)
Is there a test to see if my stock auto dimming mirror is actually working? At night I can't tell if it is dimming at all. The compass and Temp. read out work as well as the power and on-star buttons.
Again, TIA!
 

Hoser

Active member
Jun 19, 2016
226
28
28
Farmington, MN
Turn lights on, block light sensors on mirror, and I can’t remember if dash sensor has to be blocked, then shine light on sensor on the mirror side of the mirror.
 
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2004LB7

Well-known member
Dec 15, 2010
6,274
1,683
113
Norcal
I think the dusk dawn sensor needs to see dark / auto headlights on. Shine a light on the mirror sensor and see if the mirror darkens. Remove light and mirror should lighten