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Author Topic: Alarm problem  (Read 4570 times)

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wigan pier

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Alarm problem
« on: 02 August 2006, 05:04:56 »
Hi All,
      omega 2.5 cdx alarm started going off today car running or not! tried turning the interior sensors off in case of insect flying around..no luck..the battery is fully charged any ideas guys?

Cheers Gord. :-/
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Re: Alarm problem
« Reply #1 on: 02 August 2006, 06:17:01 »
First place to look is the bonnet sensor, these can give problems on an Omega.
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TheBoy

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Re: Alarm problem
« Reply #2 on: 02 August 2006, 09:05:21 »
Is it the horn or the power sounder?
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Markjay

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Re: Alarm problem
« Reply #3 on: 02 August 2006, 09:12:41 »
If Power Sounder, it could be that the internal rechargeable battery is dead - this can cause the alarm to go off for no reason. Did you hear the omnious 'four beeps' from the engine area? Other than that the most likley cause is a sensor, probably the under-bonnet one, as AA said.
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mr des

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Re: Alarm problem
« Reply #4 on: 02 August 2006, 14:02:30 »
where is the power sounder as my 96 2l has the most discrete alarm ever it just flashes the indicators so methinks there is a wire astray
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Markjay

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Re: Alarm problem
« Reply #5 on: 02 August 2006, 14:27:29 »
It's either at the front under the wing behind the inner mud guard or under the scattle board at the base of the windscreen on the opposite side of the Pollen filter - depending on your model etc.

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wigan pier

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Re: Alarm problem
« Reply #6 on: 02 August 2006, 14:33:34 »
Quote
If Power Sounder, it could be that the internal rechargeable battery is dead - this can cause the alarm to go off for no reason. Did you hear the omnious 'four beeps' from the engine area? Other than that the most likley cause is a sensor, probably the under-bonnet one, as AA said.


It's the power sounder..and I have heard no beeps (yet)...what is the usual falt with the under bonnet sensor?

Cheers Gord.
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TheBoy

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Re: Alarm problem
« Reply #7 on: 02 August 2006, 14:43:04 »
If its underbonnet sensor (attached to PAS bottle), that normally sounds the horn (you can test which sounder by opening bonnet, press and hold down that switch, arm the car, wait 45s, then release switch - it will be very loud though!)

The power sounder one is normally a problem with the power sounder itself (eg batteries) or the wiring to it...
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Markjay

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Re: Alarm problem
« Reply #8 on: 02 August 2006, 14:45:05 »
It gets knocked about when so-called mechanics work on the engine bay, and as result the sensor may be too low and think that the bonnet is open while it isn't...

But this should only get the alarm going while the car is alarmed, i.e. after locking it, if you get the sounder going while the vehicle is not locked then it is not likely to be the sensor at fault - the power sounder battery is more like it.

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mr des

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Re: Alarm problem
« Reply #9 on: 02 August 2006, 15:08:27 »
Quote
It's either at the front under the wing behind the inner mud guard or under the scattle board at the base of the windscreen on the opposite side of the Pollen filter - depending on your model etc.


many thanks sir much obliged
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wigan pier

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Re: Alarm problem
« Reply #10 on: 02 August 2006, 16:55:35 »
Hi one thing my son noticed is that when the alarm went off the indicators did not flash!! they normaly do..not had time to look at it yet as it's peeing down here.... :'(

Gord.
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PhilCavSRi130

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Re: Alarm problem
« Reply #11 on: 04 August 2006, 00:55:34 »
I have problems with mine going off when the sun gets on it for a while!!

Seems worse if the sun keeps going in then back out again. I thought at first that it might be the ultrasonics so removed them to no effect. Have resorted to disconecting the battery when its going to be stood for a few days.

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wigan pier

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Re: Alarm problem
« Reply #12 on: 04 August 2006, 05:46:18 »
Quote
I have problems with mine going off when the sun gets on it for a while!!

Seems worse if the sun keeps going in then back out again. I thought at first that it might be the ultrasonics so removed them to no effect. Have resorted to disconecting the battery when its going to be stood for a few days.


Mine only started going off after I left my rear blind up??? since I lowered the blind it's been ok since..could be coincedence?? :-/
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Re: Alarm problem
« Reply #13 on: 04 August 2006, 07:02:00 »
Quote
I have problems with mine going off when the sun gets on it for a while!!

Seems worse if the sun keeps going in then back out again. I thought at first that it might be the ultrasonics so removed them to no effect. Have resorted to disconecting the battery when its going to be stood for a few days.


I would almost certainly suggest it is your bonnet sensor that is causing the problem, especially as it happens when the sun gets on it. Common problem.
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Andy B

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Re: Alarm problem
« Reply #14 on: 04 August 2006, 07:08:25 »
Quote
I have problems with mine going off when the sun gets on it for a while!!

Seems worse if the sun keeps going in then back out again. I thought at first that it might be the ultrasonics so removed them to no effect. Have resorted to disconecting the battery when its going to be stood for a few days.

Disconnect the plug from the switch to prove it. Switch is normally closed - shutting bonnet should open it, so that when Johnny Toe-rag opens the bonnet it closes, switches to ground/earth & triggers the alarm. If the switch is disconnected it won't be able to switch to ground/earth. The switch bracket probably just needs straightening so that the switch is vertical.
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