1992 buick regal static in radio when I open doors
 

First off the car from Florida. So their no rust on it other than trunk lid where paint cooked

I get static in the radio when any doors open .with motor running . I've taken off all belt and it still does it . I've tanek interior bulb out . I'm not sure it ive tried turing inter light on with head light switch or not ?

Have people had trouble with this remote factory radio set up ?