Vauxhall Vectra - Replacing Battery Sets off Alarm

this may be abit hit and miss, but, have you connected the bat then locked the doors and unlocked them.

No, I haven't tried that. I wont be round at my friends till Saturday (it's Thursday today), so I can try that, but I'd welcome any other suggestions too.

there is another i can think of, after fitting the battery, turn on the ignition (but do not start the engine and make sure all doors are shut) then press one of the buttons on the key, it should then lock and unlock the central locking. thus programe the key to the car security devices.

Looking at her key - when I press the buttons the red light doesn't light up, so I guess the key battery is flat. It's ages since I changed a car battery, but if this palaver is progress I'm unimpressed!

the battery can be bought from and cheaper from a computer shop, its a "cr2032" . its the same one used to keep the computer clock going after it is turned off

IIRC, to prevent the alarm going off (both when disconnecting + reconnecting the battery), turn the ignition on, and then off leaving the key in (you want it so the ignition is off, and steering lock off).

Should that not work, just turning the ignition on once the battery is connected will turn of the alarm. Once the immobilizer picks up a recognized key code, it turns of the alarm.

Many do this at power up. If they didn't, all a thief would need to do is disconnect the battery then reconnect it and drive off.

Just disarm it in the normal way.

The one in a Renault Clio key is'nt !!

Dave

Of course not - it's French.

:-)

Chris

I know, my mistake, must take more water with it Sorry guys.

Dave

Thanks for all the suggestions :)

you are welcome m8, but did any of them work ???