Chris NottEM Tuning
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  1. #1
    The911SC's Avatar
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    Speaker buzzing - no output

    Hi All,
    Just got back from the dealers. Car was in to rectify a buzzing speaker (rear right). The buzz is interference that changes with the engine and no audio output at all. The dealers ordered a new bose amp and speaker to be safe, fitted both but the buzz is still there.
    I know its not the head unit since I have an rns-e which i retrofitted, and re fitting the concert 3 unit gives the same.

    Any ideas?, the car is back in next week for them to take a closer look but I am stumped and wonder if I did anything in my retrofit?.
    Porsche 997 Carrera 4 S - Black, Sport Chrono, Sport seats, PCM, Nav, Tel, Park assist and rear wiper (Yes!, its an option!)
    2012 Audi Q7 Sline Plus - Daytona Grey ,Nav+, Wheel upgrade, Storage and tow pack.

    Gone -2007 S5 4.2 ,2008 S3, 2007 TTC 3.2, 2007 RS4 Saloon, 2004 S4 Saloon, 2006 A4 2.0T Sline SE,2002 A3 3.2 Sline, 2001 A4 1.8T,2001 Boxster, 1983 911SC,1992 Corrado G60,1988 GTi.

    (Vag com owner)

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  3. #2
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    Has to be wiring if the amp & HU swap made no difference. That's all thats left.
    My money would be on the rear right preout wiring between the HU and the amp. Probably the screen has come detached on the rear right signal, that would kill the audio and give you alernator whine. If it was anything else you wouldn't get anything from the rear right.
    "How to tear apart the ties that bind, perhaps fcuk off might be too kind"
    Alex Turner

  4. #3
    The911SC's Avatar
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    Thanks Andy. Given its bose, is there a rear pre out feed to the amp?, and why would it just be one side?. Are the pre outs screened?, and if so, where are they earthed?. Given I have been proding around with the connector, I guess it could be this but not sure of the symptom. Is there an earth/screen pin to the HU in the green connector of the multi block?
    Porsche 997 Carrera 4 S - Black, Sport Chrono, Sport seats, PCM, Nav, Tel, Park assist and rear wiper (Yes!, its an option!)
    2012 Audi Q7 Sline Plus - Daytona Grey ,Nav+, Wheel upgrade, Storage and tow pack.

    Gone -2007 S5 4.2 ,2008 S3, 2007 TTC 3.2, 2007 RS4 Saloon, 2004 S4 Saloon, 2006 A4 2.0T Sline SE,2002 A3 3.2 Sline, 2001 A4 1.8T,2001 Boxster, 1983 911SC,1992 Corrado G60,1988 GTi.

    (Vag com owner)

  5. #4
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    Yes, yes & yes. Each channel is seperately screened and earthed at the HU and the amp.
    "How to tear apart the ties that bind, perhaps fcuk off might be too kind"
    Alex Turner

  6. #5
    The911SC's Avatar
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    FIXED!. Thanks Andy (once again!) you were right.
    I took the multi block apart and pulled out the green connector, releasing the black insert, I found the green wire was pushed right back. I couldnt re seat it and pulling it out (despite using a pin to press the tang down) resulted in it snapping. I pushed it out from the other side with a paper clip and extracted the broken plug.
    I had some repair wires (the yellow ones with a clip at each end) so slotting a new one in, soldering it to the green and shrink wrapping it resulted in it all working..

    It made sense really thinking about it but HUGE thanks, its now sorted and all back together with the rns installed.

    Cheers Andy

    Jon.
    Porsche 997 Carrera 4 S - Black, Sport Chrono, Sport seats, PCM, Nav, Tel, Park assist and rear wiper (Yes!, its an option!)
    2012 Audi Q7 Sline Plus - Daytona Grey ,Nav+, Wheel upgrade, Storage and tow pack.

    Gone -2007 S5 4.2 ,2008 S3, 2007 TTC 3.2, 2007 RS4 Saloon, 2004 S4 Saloon, 2006 A4 2.0T Sline SE,2002 A3 3.2 Sline, 2001 A4 1.8T,2001 Boxster, 1983 911SC,1992 Corrado G60,1988 GTi.

    (Vag com owner)

  7. #6
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    Nice one, how much of the car do you think Audi would have replaced before they solved the issue?
    "How to tear apart the ties that bind, perhaps fcuk off might be too kind"
    Alex Turner

 

 

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