This may be a stupid question, but did they plug the sensor/wire harness back in? I also think there is a reinitialising process for the rain sensor whenever a new windshield is installed.
The light sensor is on the back (forward facing) side of the mirror itself, not attached to the windshield. On the passenger half of the mirror backing, there's a recessed area and a photocell inside. You can see it right underneath the toll transponder in al_macaroni's picture.
Last edited by AzNMpower32; 01-04-2013 at 04:20 PM.