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Draw a diagram - it helps to understand. (archive)
[ Follow Ups ] [ 7-series (E23) Message Board ] [ Msg. Board FAQ ]
Posted by No steering wheel on November 25, 2001 at 08:52:42:

In Reply to: 1985 735i how connect loudspeakers? posted by lb9000 on November 25, 2001 at 07:10:23:

Open the footwell covers and check the wire colours. Same check the rear.
With an Ohm meter you can check that the wires are not interupted.
Also bear in mind that radios were fitted not only with balance but also faders in the mid eighties.
For this reason you often find E23's without faders built in.
I hope this is true and not that you could get the car with either 2 or 4 speakers. Which would make the fader obsolete.
If your car radio has a fader built in.
Look for 4 speaker output at the rear of the radio, you should bypass the fader and reconnect cables.

If you cannot identify the problem. Email the wiring diagram to me and I tell you what's wrong.
For a fax number email me.

Best regards
Ralf

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