The map light on my 2008 Accord V6, GPS, etc. works but the light that should come on when the door is unlocked/open does not. Neither does the dome light in the rear come on in any switch position. I took the lens off the map/reading light and the bulb looked okay. Are there two elements in the bulb so therein I could replace the bulb or is something else causing the problem. The lights in the front doors work fine. Please advise, Larry P.