The right rear speaker in my 93 100CSQ Avant no longer works. Anyone have experience repairing or replacing these? Any information appreciated. I haven't pulled it out yet. Don't suppose it could be something simple like a disconnected wire ? Best Regards David Torrey '93 100CSQ Avant 119K miles '88 Saab 900S 205K miles '87 Saab 900S 203K miles '79 BMW 320i 100K miles