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Alarm Siren Intermittent

Discussion in 'A3/S3/Sportback (8P Chassis)' started by MC10, Jun 11, 2013.

  1. MC10
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    MC10 New Member

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    Hi Guys,

    Just got a small issue that's starting to really bug me,

    My 2004 A3 alarm will only go off when I central lock my car BUT the alarm is intermittent and it doesn't always go off...like this morning parking up for work it never went off when I central locked it...but last night about 8ish this alarm kept going off when I tried to lock it..and on the odd occasion it wont turn off even when I unlock the car...I need to turn the ignition on to turn it off, but thats the odd occassion that happens.

    Can someone please help?? :)

    Thanks

    Marchy
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  2. Chillout
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    Chillout Member

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    Scan it with vcds mine did this the other day not scanned it yet but it could be the back up battery in your alarm module do you hear beeping in the car no the full volume of the alarm just a beep.
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  3. MC10
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    MC10 New Member

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    Hey,

    Nah no beep...just the alarm. I was thinking it could be a faulty siren maybe? Or could it still be the battery? As it doesn't happen all the time...so annoying lol!!
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  4. leeds2592
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    leeds2592 When I grow up, I want a 964!

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    Mine started doing this a few weeks back. It started going off for now reason in the middle of the night then a couple of days later, the alarm would go off but only the lights, no siren. Scanned it with VCDS and with a bit of research it seems as though I need to replace the siren which is a bit of a PITA to get to and replace.

    Get it scanned with VCDS so you can see what codes coming up and take it from there. If you clear the code, it may just fix the problem.
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  5. NHN
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    NHN Modmetractor

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    Yes the siren is located in a real pita location, not a job I would like anyone to have to do, but as above could be variety of things, convenience module, siren, wiring etc, so get it scanned.
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  6. MC10
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    MC10 New Member

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    Where is the siren located?

    Might have a look at getting a new siren for it.
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  7. NHN
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    NHN Modmetractor

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    Scan it 1st, then consider siren, as could be wasted job.
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  8. leeds2592
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    leeds2592 When I grow up, I want a 964!

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    It's located somewhere in behind offside wheel arch from what I've read.

    As myself and Nigel have said, get it scanned and take it from there instead of replacing something that might not need replacing!
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  9. autolatry
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    autolatry Member

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    Mine does this. Got this fault when it was scanned.
    There are two horns on mine one on either side of the engine bay (low level).
    Its just another thing on the list for me. The horns aren't expensive.

    Address 46: Central Conv. Labels: 8P0-959-433.lbl
    Part No: 8P0 959 433
    Component: KSG H02 0040
    Coding: 198800186D288505485AC63000
    Shop #: WSC 06435 000 00000
    VCID: F9F21A8AB068CED0E62

    Part No: 1K0 951 605 A
    Component: LIN BACKUP HORN H01 1201

    Part No: 1K0 907 719
    Component: Neigungssensor 002 0002

    Part No: 8P0 951 177
    Component: Innenraumueberw.H03 0010

    2 Faults Found:
    01134 - Alarm Horn (H12)
    004 - No Signal/Communication - Intermittent
    01134 - Alarm Horn (H12)
    #9
  10. NHN
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    NHN Modmetractor

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    I think you're confused with the actual car horns, not the siren mate, on pre mid 08 cars it had 1 each side of the lock carrier, facelift cars moved both to drivers side, the actual siren remains a single one.
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  11. autolatry
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    autolatry Member

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    Ahh. I forgot about the horn horn. Of course. Ha

    So the two red horns are the horn sounders nowt to do with the alarm.

    Any ideas where the alarm is on the 3.2 as the above indicates it's goosed does it not?

    Not a lot in my engine bay ATM and I haven't noticed it.
    #11
  12. NHN
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    NHN Modmetractor

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    Red, they're usually black, unless you're being funny :p
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  13. autolatry
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    autolatry Member

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    99% sure they are red. Hmmmm , I'm gonna have a look in a minute.
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  14. NHN
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    NHN Modmetractor

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    Maybe you wish they were lol
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  15. autolatry
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    autolatry Member

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    Just checked them. They are black. FFS, need to lay off the mushrooms I think lol.
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