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[GrayUK]

Help!

I have a problem that has developed over the last 2 weeks.
I have an Omega Estate 2.2 (2001) model. (post facelift)
The alarm keeps going off, no reason I can see.
I have disabled the internal cabin sensors and it still does it.

But….not all the time.

If I go for a run it will do it, maybe 3 times then after 1 hour or so I can set it and no problem?

1)      Any ideas what to look for?
2)      Can I disable the alarm but still lock the car?
Some guidance would be gratefully received.

[VXL V6]

Very likely top be the bonnet switch. Try disconnecting it and seeing if it still does it.

[GrayUK]

I will go and do it now, it has gon off twice since i posted  

[GrayUK]

Many thanks for the fast feedback, i have done it, so we will see  :-/

[GrayUK]

No sooner had i posted and it went off!!!

Any other suggestions....please

[GrayUK]

OK....removed the tailgate switch and ....it has not gone off yet...

[Debs.]

This might be a Power Sounder fault; that would cause the alarm to go off at any time; with the alarm set or not. (sometimes even when driving).....this 'spontaneous' activation would be typical of the Power Sounder being faulty.

The Power sounder has it`s own internal NiCad batteries and when they become aged this fault can occur.
It would need removal and/or replacement.....`when I found how expensive they were I removed mine.

However, there may be potential insurance-cover consequences if a claim were made and it was discovered that the alarm system sounder had been so-inactivated. Although the indicator lights still flash when the alarm goes off and the immobiliser operation is unaffected by the change to the alarm.

[MutantCav]

Where is the power sounder located?? Somewhere near the double horn things??

[Debs.]

It`s in a pokey 'dark hole' bolted to the the rear-face of the front off-side suspension turret.

It`s effectively down-under the plastic scuttle (driver`s side) below the wiper linkage: I presume it`s there to make access tricky for 'casual thieves'.

Its a bugger to get at and really you have to remove the wiper arm and lift the plastic scuttle up to get your hand in....I cheated and bent the scuttle tray back just enough to get my little 'paws' in there and pull off the wires/unbolt the (single) alarm-horn and the black box-like power sounder.....

The two horns under the wings/bumper are the 'road horns' and can be left alone as they`re not connected to the alarm system.
You have to do the battery disconnect within 15 seconds of turning off the ignition thing before working on the alarm system horn disconnect.

[MutantCav]

Is it the same pre/post facelift?

[VXL V6]

Yes. Hidden down underneath the Scuttle panel as Debs says.

When you set the alarm does the lamp flash slow or fast?

[GrayUK]

Have not noticed the speed of the flash. Do you mean once it is set or during the 10 seconds or so?

[VXL V6]

First ten seconds. if it flashes fast there is a fault in the system.

First thing to try would be to disconnect the power sounder as Debs said.

[GrayUK]

Deb and guys, thanks for your input.
Since I removed the tailgate switch it is quiet. :-?

But tomorrow will tell, when I take it out for a run, and then park up.
I will let you know how it goes, otherwise I will be into the power sounder :-/

[davlad22]

The tailgate switch on one of our estates is very sensitive as well, you only have to try and pop the boot when the car is locked and it goes off. Anti theft device at the moment but have a feeling it could get to be an annoyance device if it plays up!