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A3 8L Aftermarket head unit install help required

Discussion in 'A3/S3 Forum (8L Chassis)' started by robsta3, Jul 1, 2012.

  1. robsta3
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    robsta3 New Member

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    [Jul 1, 2012]
    Hi,
    I recently purchased an A3 1.8T 2001 8L and have decided to swap the stock Concert II system for an Alpine unit, I removed the stock unit and purchased a PC9-401 harness which I think is incorrect maybe the PC9-404 as I have no BOSE speaker but a stock sub in the boot? however when I connected the Alpine unit using the 401 harness I have no power to the unit at all??? any advice appreciated.

    Thanks
    #1
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  3. 86fran
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    86fran New Member

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    [Jul 1, 2012]
    im sure that you will only be getting one power feed to the headunit, so it will not turn on. You will have to run a separate switched ignition power line to the headunit.
    #2
  4. Munch
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    Munch Member

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    [Jul 1, 2012]
    Yeah, the ignition switch for the standard stereo is built into the stereo. You will need to source an ignition live from somewhere in the cars loom. I'll be doing mine very soon. I kniw of an ignition live on the light switch, black/yellow wire in fuse box. But I want one a bit closer so don't have to wire it as far
    #3
  5. S3_Olly
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    S3_Olly Full Throttle

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    [Jul 1, 2012]
    #4
  6. robsta3
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    robsta3 New Member

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    [Jul 1, 2012]
    Thanks for the reply's, something like this into the fuse box then? http://item.mobileweb.ebay.co.uk/viewitem?itemId=221053776979

    Thanks again
    #5
  7. S3_Olly
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    S3_Olly Full Throttle

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    [Jul 1, 2012]
    check the link above mate everything you need to know is on there and its a simple guide, it is what i refered to when i did mine and all is well.
    it also shows you earthing points too which are handy.
    #6
  8. robsta3
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    robsta3 New Member

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    [Jul 3, 2012]
    Almost there sorted all the power supply as per the guide above, only problem I have is the Aerial, although its the correct fittment there's absolutely no reception, I've read about the Aerial boosters but they all seem to suggest the booster is for improved mw reception andy one else had this issue?
    #7
  9. BtownA3
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    BtownA3 Member

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    [Jul 4, 2012]
    Have you powered the aerial ? 8L's have a "Power Antenna"
    #8

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