1997 740i RADIO ISSUES NO OUTPUT - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 10-30-2012, 02:20 PM
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1997 740i RADIO ISSUES NO OUTPUT

I am working on a factory system. It has no sound output. replaced head unit, amplifier with working test units, I dont know what else to look for. fuses are good.
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#2 (permalink) Old 10-31-2012, 12:42 AM
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How is the wiring? The wiring loom is known to fray and short where it connects into the trunk.


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#3 (permalink) Old 10-31-2012, 10:59 AM
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Wiring is good. I also checked for power at the amp. It is getting power and the amp turn on wire is also good. is there any other troubleshooting tips that I can try.
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#4 (permalink) Old 11-01-2012, 12:56 AM
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In my E36 when i disconnect any one part of the sound system (ie speakers, CD changer) the whole system fails to produce sound. No power to head unit until all is reconnected. Found this out while swapping in new rear shocks because i had to disconnect the speakers and cd changer.


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