Iwant to stop my alarm siren. what if I just cut the wire going into the sigma alarm immobiliser AS ONE CAR REPAIR MAN TOLD ME? IT DOES NOT HAVE TYPE NUMBER 1998 RENAULT MEGAN BUILT IN. i START MY CAR BY PUTTING THE BY PASS NUMBER AN IN THE MEANTIME THE SIREN STARTS AND WAKES UP EVERYONE. WHEN MY CAR STARTS I PULL OUT THE SMALL SHORT CIRCUIT FUSE AND THE SIREN STOPS BUT ALSO i CANT USE MY RADIO AFTER THAT . WHAT TO DO?