Ok............ heres the story, wife calls and says car wont start ('95 Bonneville), get the car home, when the door is open and dome lights are on, the instant you turn the key to run the lights go out. I also noticed that the rear defrost switch lights up. After 4-5 seconds the dome lights come back on. When this happens the car cranks but wont start, fuel pump is not running. I check and clean the battery terminals, and all the grounds including the buss connectors, all of which look ok and not corroded. Still same problem, I did notice with key on, door open so dome lights are on if you turn on the rear defrost the dome lights go oout. This is compounded by the fact that it seem to be intermentant as sometimes it will start fine. ANY IDEAS???