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1998 S70 Alarm won't stop going off & locks, windows disabled -- diagnosis? S70

posted by  rob2volvos on  Tue Feb 24 16:13 CST 2015
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last visit: Wed Mar 12 07:52 CST 2014
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A friend of mine reports a peculiar combination of issues on her 1998 S70:
1 -- The car was running fine -- locks and windows working.
2 -- She parks the car, locks it.
3 -- She returns to the car unlocks it -- alarm goes off
4 -- Alarm won't stop going off and the locks and windows are disabled
5 -- She takes the car to a Volvo specialist (?) and (after much ado in which they too have trouble turning off the alarm) they diagnose a faulty alarm control unit -- and an estimate of $700 to fix.

Questions:
1 -- I found this on ebay for $60 -- will it fix this set of issues?
http://www.ebay.com/itm/98-99-00-Volvo-S70-OEM-lock-alarm-control-unit-module-computer-part-9472461-/200738843803
2 -- How difficult is it to replace the faulty board with a working one? I have some experience on RWD but none on more recent models.

Thanks,


Rob








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    1998 S70 Alarm won't stop going off & locks, windows disabled -- diagnosis? S70

    posted by  KlausC on  Sat Feb 28 13:45 CST 2015
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    last visit: Fri Oct 24 10:15 CST 2014
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    Check this out:

    http://www.matthewsvolvosite.com/forums/viewtopic.php?f=1&t=36431

    --
    My name is Klaus and I am a V♂lv♂holic








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    1998 S70 Alarm won't stop going off & locks, windows disabled -- diagnosis? S70

    posted by  B.B. on  Wed Feb 25 04:57 CST 2015
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    last visit: Mon Oct 6 13:15 CST 2014
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    Hi Rob,

    Just replacing that module shouldn't be hard.
    I looked in the 850 manual, and you should get the exact Volvo wiring
    diagram for your car. It will have separate diagrams for sedans and wagons etc.
    It will have component location diagrams.

    In the 850 that module is to the right of the glove box, and shows a small
    connector so it should be easy to swap.

    Bill







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