little green light under the dash

[johne3191]

My latest 69 has factory air but on the diffuser under the dash is a little green light - short of the government keeping tabs on me or aliens - what does the green light signify?.... must have something to do with the air system - but I'm at a loss to figure this one out...


Previous owner add it ??? - I suppose I should find the manual that comes with the car - probably would be an explanation in there...


Thanks

John E.