K, now i'm getting frustrated with you. The Chrysler guy JUST said that the sensor on the roof is the Thermal Sensor. The "light" on the right is not a light. It is the sensor for the dimming. Got it?notyorz.. my original question was what does the second light on the right do.. the sensor is further back in the middle, then the two green lights.. left one comes on when u press power button, but the right doesnt seem to do anything.. guess may be a dummy or maybe a feature for a different car they use same part in we dont have.