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  1. SXi

    SXi New Member

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    Location:
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    Hi all

    Am a new non-techy member - any ideas for an Astra Mk 4 '99 1.6 SXi alarm problem please? It's driving my neighbours, their young kids and me crazy, especially at 2 am!

    Once car is locked with key or remote fob, the alarm goes off with no obvious pattern as to when/where/temperature/how long after car locked/etc. Have tried disabling interior and tilt sensors (using interior light buttons as per manual), disconnecting bonnet switch but still goes off at random times (car horn, siren and indicator lamps). Car battery checks out at 12.2 V and turns engine over no problem even in cold. When setting alarm, the dashboard LED flashes for 10 sec rather than continuous, which manual says is a fault of some type.

    Vauxhall dealer wants £45 for a diagnostic check (apparently the connector is near the handbrake??) and suggests it might be the power sounder (sounds expensive).

    At moment am having to lock 3 doors internally, lock boot but leave driver's door unlocked, with crooklock attached. Not ideal!

    Any ideas much appreciated, either to solve problem or disable alarm and allow me to lock car properly!

    Thanks!
     
  2. goonas

    goonas VxON Club Member VxON Club Member

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    Moved to correct forum.
     
  3. Andy

    Andy Not Here

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    powersounder has gone,
    happens to all the astras after a while,

    its the little backup siren thats in the passenger wheel arch designed so if the battery is disconnected it sets the alarm off,
    water gets into the wheel arch and makes this part go, and causes the alarm to get more and more tempremental until it will go off anytime (even when the car is running)

    you should have had advanced warning as you would hear 4 quiet beeps every now and again radomly, this is a sign of it going,

    the check vauxhall are talking about is pugging a machine called "Tech 2" into the diagnositc plug and reads all the faults the car has, so this would show up as a powersounder fault (if im correct).

    i have no idea how much they cost as i didnt pay to get mine done, but all the do if lift the car up on a ramp, take the lineing out of the wheel arch and remove the powersounder, at this point it will go off and theres no way of stopping it until its battery runs out (they usually put it in a box to drown out some of the noise) they will fit a new one and then need to plug the "Tech 2" back in, enter your security code (on the card that came with the car from new) to allow the car to start,
    without the security code the immobiliser will stay on and you cant start the car, this is so someone cant steal the car and just unplug the powersounder...

    sorry for the long reply but i hope it helps,
     
  4. GeordieBandit

    GeordieBandit New Member

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    There is a cheaper way - u can buy special batteries that fit the powersounder for about £15 or thereabouts. U have to disassemble the unit and reseal it yourself (with silicone or similar water resistant material) and should save about £40 or more than gettin a new unit. I'll try and find some more details about this as its a very common problem on the G and has been discussed several time on here and over on a "rival" owners forum which I use. I'm sure they wont object to me borrowing the advice and posting it up here..... gimme a while to find out and I'll post an update shortly. HTH
     
  5. SXi

    SXi New Member

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    Thanks for your replies.

    I'm probably over-complicating things here - but i haven't heard the 4 beeps you mention on my car, but have on a collegue's mk 4 astra. Also, not only my power sounder goes off, but also the car horn and indicator lights. Could that suggest something other than/as well as the power sounder?

    Thanks again!
     
  6. Andy

    Andy Not Here

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    ot does make the whole alarm go off not just the powersounder,

    not really sure about the 4 beeps, thats what i had and when i asked what it meant was told it was the early stages of the powersounder going, which it did about a month laster,
     
  7. SXi

    SXi New Member

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    Great, many thanks.

    I'm not too bothered about having the alarm - could i disconnect the power sounder and not replace?
     
  8. Dynamic Dave

    Dynamic Dave Qualified lego bricklayer

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  9. Andy

    Andy Not Here

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    i wouldnt have thought that would work, or to steal your car they could just remove the siren and drive off,
    as far as i know the imoboliser will kick in and stay on until its replaced but i have known to be wrong most of the time,
     
  10. SXi

    SXi New Member

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    Fair point Andy

    Ah well... into the great unknown I'll dive!

    Thanks all!
     

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