Electrics: New battery...... alarm siren

[Kevin_L]

Hi 2005 V70

Maybe a silly question.....

My battery has been on the way out for a while....had to definitely get a new one...got a genuine one....all perfect

Now....for a while my alarm siren has been sounding randomly when the car is armed, even with the dog button pressed....so I was having to lock with the key....the siren was new 5 years ago... genuine part.....I changed when I bought the car as i the owner said the alarm was messing around .....and the sunroof didn't work....and if I'm correct some of the power for the roof goes through alarm/same circuit....any new siren fixed the roof

Now.....back to today.... battery going flat.... alarm sounding randomly.....

I bought a new battery (£120) and was told siren is now a whopping £215....so I didn't get one

However.....I've been arming the car with the remote, and so far the alarm hasn't gone off randomly once since fitting new battery....

Related?? I thought sirens had internal batteries that packed up sheet a few years and that was that

Any ideas?