Intermittent alarm going off, can I disable the alarm sounder.?

The sounder needs replacing.

https://www.google.com/search?q=2010+ford+ka+indicator+sounder+not+working

and

https://www.google.com/search?q=2010+ford+ka+indicator+sounder+location

..

Along with the immobiliser the factory alarm can't be disabled - the sounder could be disconnected if you can find it which will make it quieter while it thinks it is being stolen.

While it is possible the alarm is faulty, that isn't a big problem with factory alarms and so it is more than possible there is nothing wrong with it because it really does think the car is being stolen, probably because some of the information it is receiving is incorrect.
This might be a faulty sensor indicating a door is open or something as simple as a faulty battery cell causing the voltage to drop too fast.

I suggest you start by reading the vehicle handbook...

If key is worn or chip contacts are loose this can happen--also a bad ignition switch.

Mostly you can't as the alarm and immobiliser is integrated into the vehicle/engine management system.

It might be possible to disable it by getting at the software if you have the skill and a laptop with the right programmes but other than that disconnecting the sounder is all that is possible.
Some of the earlier Ford alarms were operated by a separate module that could be disconnected. Unfortunately these were hidden behind the dashboard and impossible to reach without first removing the dashboard.

power sounder battery has a fault, first sign its faulty is randomly going off, were the sounder is you need to remove it, and replace it, or you can try to replace the battery inside, you can remove it and alarm will revert to a horn on some models that have a horn fitted but the wiring is in there for a horn to be fitted.

It can't be removed if it is a factory system.

disable alarm on 96 avalon

an 06 should still be under warranty. if it is, run it to a dealer and have them look over the alarm system.

has your alarm got it`s own sounder or does it work with the vehicle horn.
If it works with the vehicle horn, then it could be the earth wire(ground wire) corroded.
let me know what happens

Hi.
With everything connected and ignition switched on, check the supply area around the ignition switch. If there is power there, the alarm interrupts the supply after the ignition switch.

Next with ignition on, check supply at the coil input. If there is no supply there, route cable from ignition switched live to coil supply +ve. All other circuits should get this bridged supply and work normally.

Remove any sounder.

If this doesn not work, let me know and I'll go into more detail.

Hope this helps.