Those three little buttons on the rear view mirror are for your “garage door opener.” Instead of clipping that big remote to your visor, you can program those buttons to open your gearge for you.
How do I know if my mirror is auto-dimming?
On the rear side of the mirror (facing windshield) there’s another sensor which senses light from the front. The easiest way to see if it’s working is, when there’s a car behind you with lights on, cover the front sensor — the mirror should get brighter. Take your hand away from the sensor and it should dim again.
What is Troxler effect automotive?
Gentex, a major manufacturer of auto-dimming mirrors, calls this the “Troxler Effect,” and describes its dangers, saying: This phenomenon, known as the Troxler Effect, postpones driver reaction time by up to 1.4 seconds. At 60 mph, a car will travel over 123 feet in this amount of time.
How do I stop my rearview mirror from dimming?
Shining the flashlight on this sensor causes immediate auto-dimming to occur (on both mirrors). Placing your thumb (or a piece of tape) over the sensor prevents auto-dimming.