I just noticed the other day, the radio sounded a little 'different' and when I set the fader to 'rear' I get no sound. It doesn't look like the wires are disconnected (looking in the trunk, behind the seat) and I'm sure they did work after I replaced the radio (an OEM AM/FM, i replaced with an OEM AM/FM Cassette), so I'm puzzled to why they don't work now.