Alarm was installed post purchase of vehicle in 1992. The alarm had been disabled using the under bonnet key to the system box. Recently replaced flat battery - now alarm permanently sounding off 4 - 5 secs then off and repeat. I think it must have reset with the new battery install to ON. Have misplaced key to immobilser unit under the bonnet and the 2 radio keys gave up the ghost years ago there is a small led light lit in the centre console. How can I disable or get get replacement master key/ radio keys

mick richards, February 2012