Recently purchased a 1987 325is from the second owner. Supposedly the radio and all but one interior lights went out about a week before I purchased it. The OBC also resets itself often. I’ve done some digging and have checked/ cleaned the corresponding fuses under the hood. I have also pulled out the head unit (Alpine) cleaned the fuse on the back and cleaned connections. Still no power to the unit (or at wired connector). Wondering what you guys think, I believe the interior lights and radio are connected somehow but the drivers side interior light still works. Door chime does not, also read that’s somehow in the mix. Thanks for taking the time to check this out