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BMW635csi Alarm & Onboard Computer

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Gareth91971 View Drop Down
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Joined: 25 Feb 2019
Location: Preston
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    Posted: 03 Mar 2019 at 7:08pm
Can anyone shed some light or offer advice about an issue with my 1983 635csi, which I have recently acquired.
On starting up sometimes the horn alarm goes off for 30 seconds especially if the door is open. By pressing the Test button with the door shut it usually stops but would like to stop it doing this.
Also I cannot seem to reset the clock on the on board computer, or anything with it for that matter.
There are LED digits lit up on it but nothing happens with the buttons. Does it mean the OBC is faulty,
and could this be related to the Alarm problem ?
Any advice greatly appreciated.
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