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alarm siren

205man Dec 4, 2010

  1. 205man

    205man Active Member

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    does anyone know what each of the 3 wires does that connect into the rear alarm siren of a 99 saloon?, my siren has died from the dreaded leaking internal batteries and has damaged the circuit board to much to repair,

    but i got hold of a repalcement siren from a mate, it doesnt have battery backup but im not to worried about that at the mo is just need to know which wires do what........it may not work but id like to give it ago if someone can tell which wire is which

    thanks
     
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  3. murran

    murran Well-Known Member

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    and i bet itll still come up with "alarm siren - no communication" and wont work.

    just fit a proper siren? there not expencive?
     
  4. olds_kool

    olds_kool Active Member VCDS Map User

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    £80 is pretty expensive
     
  5. aragorn

    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    i got one for about 20 from an A8 that was only a few years old on ebay.

    The wires are, 12v live, ground, data.

    Its not just a dumb siren, the siern and the alarm talk to each other over the data wire.
     
  6. murran

    murran Well-Known Member

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    not as expencive as they could be.

    get a good second hand one? cut it open round the sealed join and replace the 32p battery and glue gun it back together for peace of mind?
     
  7. 205man

    205man Active Member

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    replace the battery with what tho as the orignal battery manafucture has gone bust,

    aragon, do you have a part number for the a8 one? as they seem to come up for sale more often and didnt know if there were different ones
     
  8. jcb

    jcb Active Member

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    not worth trying to replace the battery, I tried matching the original batteries with 4 nicad's. didnt work, charged but I still threw a code.

    sits under my desk now, problem solved
     
  9. aragorn

    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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  10. Pro-cookie

    Pro-cookie Member Audi A4 Audi Avant Owner Group

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    Hi guys, sorry to regen an old post but I have a problem with my alarm siren. It doesn’t work. I’ve had two off eBay both of which sellers told me the sirens worked. I plugged them in and left for 24hours to build charge in battery pack, they don’t throw a code either. I’ve set the alarm off and it’s silent. Is there a reason the sirens won’t be working or have I been unlucky?
    I’ve cut one open to check battery’s and you can’t get them anymore or a battery similar.
    Any help would be appreciated thank you guys.
     

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