Mirror Identification

[Alexxn]

Can anyone tell me what the little square lens is on the back of my rear view mirror ? 2018 Laramie

 

[rixter99]

Maybe the auto-dim feature if your have your brights on...

 

[Mpgrimm2]

Yep. Daylight sensor for the AutoDim feature. There a small sensor spot on the the actual glass to sense bright lights behind you.

If you block it completely and shine a light at the mirror glass, you can force it to dim

M² Mods.

 

[Ricks Ram]

Can anyone tell me what the little square lens is on the back of my rear view mirror ? 2018 Laramie

View attachment 240299

It's for the rear view mirror dimmer. The front lens in your picture detects the ambient light through the windshield that tells the mirror when it's dark enough to switch to Auto Dim. The little sensor in the actual mirror glass itself is to detect headlights shining on the mirror from behind.

Sent from my SM-G981U1 using Tapatalk

 

[Alexxn]

It's for the rear view mirror dimmer. The front lens in your picture detects the ambient light through the windshield that tells the mirror when it's dark enough to switch to Auto Dim. The little sensor in the actual mirror glass itself is to detect headlights shining on the mirror from behind.

Sent from my SM-G981U1 using Tapatalk

Ahh OK that solves it, thanks !