Hi.2 weeks ago we have to disconnect our house alarm because i was to have render done.i switched the power off took the fuse out so thought outside sounder box will have no power in it.builder tried to unscrew the box and my surprise alarm went off.even cut the wire off still alam would not go off.opened the box and had to take the red sounder wire out.it worked.now render work is complete.i can connect the wire back in .question is when i power the alrm on would it work i mean the old password should switch the alarm off.or would it.thanks.