I own a 1999 toyota solara SLE, it has 158k miles, has not caused me any problems so far but today I noticed that my interior light, dashboard, tail lights and turn signal lights are flickering. My headlights and fog lights are fine. What can be causing this to happen, The flickering is not severe at the moment it is noticable though. I want to get this fixed before it progresses to something worse. Anyone have this issue before?