Nissan Repair: 93 Sentra dash buzzing, fuse panel, electrical inspection

Question
Its my girlfriends car... buzzing noise does not always happen.  It does only occur with the engine running... sounds like its coming from beind the fuse panel in the big terminial box.  When this happens the battery light flickers dimly.  I didnt notice any sound from the engine side at all.  I suspected a loose connection somewhere but couldnt find one.

Answer
Patrick,

Check the alternator for output to see if it is going out.  It could be a loose connection at the battery or alternator so check the connections.  I would go to Autozone or Checker for a free electrical inspection.  Email me back with what you find.