Re: Alarm question.


"Dave Plowman (News)" <dave@xxxxxxxxxxxxxxx> wrote in message
news:4faac426d1dave@xxxxxxxxxxxxxxxxxx
In article <UYWdnTAcSdiORNrVnZ2dnUVZ8uKdnZ2d@plusnet>,
Mike G <metier@xxxxxxxxxxxxx> wrote:
Last week, and again last night at 3am the alarm went off for
no
apparent reason. Last night I simply reset it, and it's been
OK
since.

As it was hot yesterday, the car was parked for most of the
day
with the windows ajar.
I was wondering if the alarm interior movement sensor could be
triggered by a bug, of the creepy crawly or flying variety.
Seems unlikely, as I believe the sensor is concealed in a roof
panel, but I know bugs can trigger houshold alarms if they get
into the alarm box.

Any ideas of where to look for the cause of such an occasional
fault.?

If you leave the windows open the alarm will likely go off.
Think it will
on simply air movement. Press the lock button on the remote a
second time
to disable these sensors

I should have mentioned that when it was left with the windows
ajar, it was parked outside my w/shop, right in front of the
office window unlocked. Visible all the time. Unless I have
something valuable in the car I usually don't bother to it lock.
I just remove the key.
Last night though, and last week when the alarm went off, all the windows were shut.

Found the problem. Faulty operating boot lock. It had been 'got
at' by a garage or previous owner.

Inside the lock itself there is supposed to be a coiled expansion
spring.connecting the latch itself with a solenoid actuated
detent, for want of a better term. Pressing the boot release
button on the key operates the solenoid, releasing the latch,
which can't return on it's own, because the boot lid springs open
slightly. Once released the spring pulls the solenoid back to a
position, where if the boot is closed again, the movement of the
latch, allow the same spring to pull the solenoid detent into
it's locking position. When the car is unlocked the boot release
handle operates the solenoid in the same way as the button
release on the key.

Obviously the handle switch is disabled when the car is locked.
There is also another solenoid, motor, whatever, connected with a
rod, that holds the lock 'detent' in it's locking position. All
seems a over complicated IMO.

At some time in the past, the spring had broken and been replaced
by an elastic band !

Obviously too weak as since I've had it, the boot has always
needed a good slam to ensure the dash display didn't show it was
open. Last night I reckon the elastic broke, as this morning the
boot was unlocked. The latch wasn't working at all. Drove to work
with the boot lid banging.

Anyway, found a suitable spring and shortened it to fit, and the
lock now works perfectly.

A long winded explanation. Just thought I'd see if I could
explain the problem specifically. Somehow I don't believe I have.
:-)
Mike.

.