The little bulb that lights the vent and temperature control knobs burnt out in my car. I found this place for a replacement led. http://led-switch.com/12 volt LED.htm. Radio shack let me down. An internet search showed that others that had this problem either went to junkyards to get the bulb out of a wreck or they were going to have to pay the dealer to replace the whole electrical circuit as replacement bulbs were not available.