My interior lights are not working properly. When I open the doors only the light under the dash and the lights on the door come on. The dome light, the two lights in the rear view mirror and the two rear lights on the coat hooks do not come on. But when I close the door, and the lights that ARE on, shut off then I can manually put the lights on on the rear view and the coat hooks. Can anyone help me in solving this problem? I checked for grounds, they look good. Car is a 94 B4U Caprice. Any help would be much appreciated.