A weird thing has been happening to my car lately. While my car is on, the interior lights will turn on and the radio will turn off, and the door locks will not function correctly. It has happened twice. One time while I was driving and the second time right after I turned on the car. In both cases, opening a door and closing it turned off the lights and turned the radio back on. Sounds like a loose wire or short circuit. Anyone have any opinions on the problem?

I just had my battery replaced at Sears. Related?

Matt
1994 E320, 143k