[yellowlotus]

after doing some electrical work i have this problem.when i arm the alarm it starts blasting right away,then 30-45 seconds later i get 4 or 5 beeps and the immobiliser activates.
but i can start the car even when the imobilizer is on!

so
i disconnected the battery for a minute and nothing
i disconnected all electrical connections i made mailny to stereo and subwoofer and nothing.
and now i'm puzzled
Help anybody

 

[SirLotus]

I believe you must have accidentally disconnected the yellow/blue wire from the alarm module to the siren. The siren is going off powered by it's internal stand-by battery. You will probably be seeing 6 or 7 flashes from the alarm LED in the dash, indicating data error.
Good luck,
Michael

 

[yellowlotus]

problem solved-burnt immobilizer fuse in engine bay caused all this mess.