Question about 1997 Land Rover Discovery

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Alarm goes off intermmitantly when the Disco TDI 300, 1997

When I lock the disco the alarm goes off for no reason. Sometime after a few minutes and sometimes after an hour or so. I cannot locate the alarm system in my Hayes Manual. do I have to take it to a dealer?

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  • bjmwh Dec 06, 2008

    By deduction I realised that the interior lights where coming on and off ( I assume a faulty delay dimmer). I have disconnected the rear and boot lights and can switch off the front light. This has stopped the alarm going off. If I leave the interior light switch on the centre position, the lights go off after 30 seconds or so but then come on intermittantly which it actually discharged the battery over a weekend when I didn't use the Disco.

    Is the dimmer a seperate unit and how do I find it?




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  • 89 Answers

First check your battery and connections.There are two alarm units , your dealer will be able to read the fault codes and advise you on what to do.I don't think it's wise to expose the security of your vehicle on line.

Posted on Dec 04, 2008

  • Karl Molich
    Karl Molich Dec 06, 2008

    The interior lights are controlled by the Multi Function Unit situated on the back of the fuse box under your steering column.This gives the light their earth path when the vehicle is unlocked by remote and is responsible for the delay after closing the door.The second earth path is through the door switches.Check if the wires havn't rubbed through to the body or onto another earth somewhere.



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