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Thread: Car audio question - 2003 Audi A4 - how to power it?

  1. #31
    Newbie Paul H's Avatar
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    Audi A4 from 2001>
    Name:  isoa.gif
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    A-BLOK
    A1 = Bose audiosysteem
    A2 = alarm Audi
    A3 = diagnose data
    A4 = ign. 12V
    A5 = blu, geschakelde 12V out
    A6 = yel/black, verlichting aan/uit-toets
    A7 = red, continu 12 V in
    A8 = black, massa
    Name:  isob.gif
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    B-BLOK
    B1 = + right rear
    B2 = - right rear
    B3 = + right front
    B4 = - right front
    B5 = + left front
    B6 = - left front
    B7 = + left rear
    B8 = - left rear
    Name:  isoc.gif
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    C-BLOK
    C1 = line-out left rear
    C2 = line-out right rear
    C3 = line-out ground
    C4 = line-out left front
    C5 = line out right front
    C6 = antenna/remote +12V out
    C7 = CAN-bus high(data)
    C8 = CAN-bus low(data)
    C9 = -
    C10 = -
    C11 = -
    C12 = -
    C13 = cd id
    C14 = -
    C15 = ground
    C16 = +12V permanent
    C17 = +12V remote
    C18 = CD line-out massa
    C19 = CD line-out L
    C20 = CD line-out R
    Paul Huijgens


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    former Saab technician


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  2. #32
    Variable Bitrate
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    I have compared the wiring diagram and the pinouts that Paul posted. The pinouts are correct, however not all of the pins labeled in those pinouts apply to your car. For example the rear speaker outputs are not available on your car, the BOSE wire, etc.

    It looks like all of the wires that you need (audio signals to the amp, amp turn-on, front speaker connections) are available in the dashboard. Crutchfield has a wiring harness for some of the dashboard connectors, but it doesn't appear to have one of the connectors that you would need. Because you are only connecting to about 8 wires and this adapter would only help you with 4 of those, it is probaby best to just tap into only the wires that you need. Here is that adapter:

    http://www.crutchfield.com/S-toLFoXn...sp?i=120701784

    Peace.

  3. #33
    Variable Bitrate
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    Thanks for all the help fellas. I have never installed any car audio stuff myself (as you can probably tell). I may go with the wiring harness kit just so when I sell the car I can put it back to stock easier.

    Next question... where should I try to install the amp for the front stage? How many watts should the amp be? Can I use a 2-channel amp and split the center speaker like it is from the factory (looks like the center uses one wire from left, one from right)? Thanks again...
    ~Puff

    View my worklog... I dare you... http://www.mp3car.com/vbulletin/worklogs/77267-2003-audi-a4-worklog-puffs-ride.html

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  4. #34
    Newbie Paul H's Avatar
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    Quote Originally Posted by walky_talky20
    I have compared the wiring diagram and the pinouts that Paul posted. The pinouts are correct, however not all of the pins labeled in those pinouts apply to your car. For example the rear speaker outputs are not available on your car, the BOSE wire, etc.

    It looks like all of the wires that you need (audio signals to the amp, amp turn-on, front speaker connections) are available in the dashboard. Crutchfield has a wiring harness for some of the dashboard connectors, but it doesn't appear to have one of the connectors that you would need. Because you are only connecting to about 8 wires and this adapter would only help you with 4 of those, it is probaby best to just tap into only the wires that you need. Here is that adapter:

    http://www.crutchfield.com/S-toLFoXn...sp?i=120701784

    Peace.

    I'm not sure wat your linking to but I only get a wiring harness that just connect's wire's, It's not converting anything
    Paul Huijgens


    Audi technician
    former Saab technician


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  5. #35
    Variable Bitrate
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    Yeah, the adapter he posted was just a wiring harness. All it does (as far as I can tell) is takes the ends of the wires that have come into the head unit and plugs in to give you raw wires again. This would be helpful if I ever put the stock HU back, I would just unplug the wiring harness and viola!

    Any ideas on what size amp (power wise) I should be looking for? Will wiring the center channel of the right and left front channel work? It seems the factory front stage is 2-channel, and the center is just split of the left and right.
    ~Puff

    View my worklog... I dare you... http://www.mp3car.com/vbulletin/showthread.php?t=77267

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  6. #36
    Newbie Paul H's Avatar
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    adapter

    Name:  dietz can interface.jpg
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    This interface converts your can-signal to a standart iso connection
    Paul Huijgens


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    former Saab technician


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  7. #37
    Newbie Paul H's Avatar
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    Name:  active interface.JPG
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    This is used to connect an aftermarket stereo to the oem active sound sytem
    Paul Huijgens


    Audi technician
    former Saab technician


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  8. #38
    Variable Bitrate
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    @Paul - that's cool. Somewhere down the road I wanna find a way to use CAN to display data on my driver info panel. It would be so cool. I'm going to be pulling the stereo out next weekend sometime and looking at the wires and how they connect to the HU.
    ~Puff

    View my worklog... I dare you... http://www.mp3car.com/vbulletin/showthread.php?t=77267

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  9. #39
    Newbie Paul H's Avatar
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    Quote Originally Posted by Puffanug
    Cool, that should work. I have not bought the soundcard yet, but it will be USB. I'll compare single channel vs. multi channel soundcards. I assume with a multi-channel card I would get better sound since i will not be splitting a signal.

    Here is a simplified diagram of the factory audio (based of the .pdf that walky talky20 posted, thanks!). I will be making another version of this showing how it will connect to the computer. Then I will add it to the main diagram for my system...

    look close to speaker wiring it's impotant to see the high-pass filter for the tweeter in the door(R27) and the other one is the full range speaker(R23)
    Name:  speaker connection.JPG
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    Paul Huijgens


    Audi technician
    former Saab technician


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  10. #40
    Variable Bitrate
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    I don't need to mess with any wiring near the speakers. All the wiring I will be tapping into is up near the HU. Still not sure the watts I need on the amp for the front...
    ~Puff

    View my worklog... I dare you... http://www.mp3car.com/vbulletin/showthread.php?t=77267

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