open bonnet and alarm horn is on top rite below black perforated cover. if you unplug it it will still sounds the alarm siren
My vectra is a 1999 S plate and has a factory fitted immobilizer, I think that alarm/ immobilisers were fitted as standard the year after mine.
no
your horn is not working, the alarm has a different horn.
That would be an alarm the horn is behind the grill
Replace the horn it has batteries in it. Alarm horn is in the left front fender. Pull left front tire and wheel. Move the inner fender and you will see the horn. You may have to find someone with Tech 2 to code the horn and alarm.
unplug the horn.
In an alarm condition, the siren output is a steady output, rather than a pulsed one. To connect the car alarm system to the car horn, simply hook it up with the relay to switch the horn power.
on n/s front behind spoiler
YesYes
Reconnect your horn and turn your key to unlock the door this will disable your alarm.
It allows you to sit in the car with doors locked and stops the alarm going off while still in the vehicle
Test is for what? To see if it works? OR To see why it goes off for no apparent reason?