Does anyones auto diming rear view work I cant see any difference in mine at night how do you test it?

 

press the button to the left ( if u have onstar)... if u dont itll bethe only button there, have someone shine a flashlight through the rear windshield and see what the difference is when the button is presseed.. And then when the button isnt pressed…

 

After you push the button, give it about 15-30 seconds to dim or un-dim. It isn't instant. If you wait, it should happen even if someone isn't shinning a light from the rear. You can see it change in daylight.

 

What button are you referring too?

 

Both PlanoTLS and iliveinapathy are referring to the auto-dim button which is located on the middle bottom (non-Onstar) of the rear view mirror. When pressed, a small round green light will appear right above the button indicating that the auto-dim feature is on. When pressed again, the auto-dim feature will turn off as well as the green light.

 

Run your hand under the rear view mirror. You should feel a button. That is most probably the one he is referring to.

 

what year is your tl? i think some cars (not sure about older tl's) have an automatic one with no button option

 

run your fingers along the BACK of the mirror near the windshield. you should feel a small depression where an ambient light sensor is located. cover it with your fingers and wait a few seconds. by covering this sensor, the mirror will think it's "night" out. the ambient daylight around/behind you will be interpretted as headlights and the mirror should dim.

 

i thouhgt the sensor for the dimmer was in the back of the rear view mirror. because when i had my parking permit for college and used to hang it on the rear view mirror and i noticed it was dim in dayligt and then when i took it off it un-dimmed...