I've been living with this problem for over 10 years. Time to FIX IT!

When I turn on my overhead map light(s) and then open the door, the map light turns off. The map light sort of dims off rather than turning off instantly.

Or if the door is open, the map light will not turn on. The rear dome light exhibits the same behavior. The door panel and under dash lights come on fine and are not affected in any way.

Does this sound like a grounding problem or a fuse problem? (I checked all fuses already but perhaps i missed one)

If this is a grounding problem, where do i start?