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Thread: Hazards going off over bumps

  1. 20th October 2009, 07:29 PM #1
    shano79
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    Hazards going off over bumps

    Just wondering if anyone can shed some light on what is causing my hazards to go off over every bump. I think it may be an alarm related thing as i have to reset the ignition to stop the hazards then reset again to lock the vehicle.
    Its a 98 series 1 disco 300tdi.
    Is there a motion sensor for the alarm that may be faulty if so any ideas on its location ?

    Cheers Shano
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  2. 20th October 2009, 07:38 PM #2
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    Scouse
    Scouse is offline OldBushie Gold Subscriber
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    It'll be a loose or dodgy interia switch.
    Scott
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  3. 20th October 2009, 08:09 PM #3
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    DiscoClax
    DiscoClax is offline Master Silver Subscriber
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    If you have had a petrol engine, you'd find it drops the fuel pump out as well... Ask me how I know that... :P

    With mine, I found that giving the switch a firm push to reset it seems to have fixed it. Has been years, many kms and still not giving any trouble. Maybe try that before replacing it?

    The switch is tucked between the washer reservoir and the windscreen cowl on V8s, not sure about diseasals...
    DiscoClax
    '94 D1 3dr Aegean Blue - 300ci stroker RV8, 4HP24 & Compushift, usual bar-work, various APT gear, 235/85 M/Ts, 3deg arms, Detroit lockers, $$$$, etc.
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  4. 20th October 2009, 08:14 PM #4
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    dmdigital
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    Quote Originally Posted by Scouse View Post
    It'll be a loose or dodgy interia switch.
    ...or you are hitting the bumps to hard!
    MY15 Discovery 4 SE SDV6

    Past: 97 D1 Tdi, 03 D2a Td5, 08 Kimberley Kamper, 08 Defender 110 TDCi, 99 Defender 110 300Tdi[/SIZE]
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  5. 20th October 2009, 08:22 PM #5
    clean32
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    its like aircraft they have to have flashing lights

    maybe driving over and not flying over will work?
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  6. 20th October 2009, 08:38 PM #6
    PhilipA
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    This is the old "alarm spider" problem for sure.
    I thought they had all gone off many years ago.
    The fault that got the D1 called the microsoft model as you had to turn it off and reboot after every crash.

    Regards Philip A
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  7. 20th October 2009, 09:35 PM #7
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    Scouse
    Scouse is offline OldBushie Gold Subscriber
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    Quote Originally Posted by PhilipA View Post
    This is the old "alarm spider" problem for sure.
    I thought they had all gone off many years ago.
    When you have a spider issue, it results in a non start as the engine stays immobilised. The inertia switch is the one affected by bumps & potholes (and big rock steps).
    Scott
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  8. 21st October 2009, 07:37 AM #8
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    trobbo
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    Also discussed here

    http://www.aulro.com/afvb/technical-...y-strange.html
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  9. 21st October 2009, 03:29 PM #9
    bblaze
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    My solution while doing the Gunbarrel Highway was, after the first major corrugation for the day was to ignore them until I stopped, reset, then start all over again. A couple of cars that come toward me told me my hazards were on, I just told them it was landrovers warning system for approaching vehicles, they smiled. I dont fret about mine as mostly its not a problem.
    cheers
    blaze
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  10. 21st October 2009, 08:31 PM #10
    It'sNotWorthComplaining! Guest
    The inertia switch is a very simple set up. If you remove the rubber button on the top it will expose a simple Metal Ball that sits in a plastic frame. The plastic grips the ball and holds it just enough to stop it propelling and engaging the circuitry.
    I found that if I very very gently shook the switch the ball would trip. I tested a new one the same way and found it took a little bit more effort to trip the ball. So my conclusion was that the old switch had lost it's effectivness to hold that ball inplace over corrigated tracks thus tripping it.
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