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need radio install help (archive)

[ Follow Ups ] [ 5-series (E28) Message Board ] [ Msg. Board FAQ ]

Posted by Rich '88 535is - Wisconsin on April 14, 2002 at 19:09:13:


My new head unit (Sony CDX-MP30) is in the car, but acting strange. The radio works fine. The CD player will play, but I won't get any sound.

My install method was to hook the positive speaker wires into the existing speakers, the unswitched lead from the unit directly to the unswitched lead in the factory wiring (red/white). This also left the wire that's part of the factory unswitched lead connector not attached to anything (possible ground?). For the switched lead I took the wire from the unit, attached a 1/4 inch spade and plugged it into the factory plug (purple/white wire). The only ground seems to be the one that shares a plug with the switched lead.

Can anyone see what I've done wrong? I just can't figure it out. Any help or alternative install methods are appreciated.

Thanks,
Rich in WI


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