I pulled mine out ten years ago because it wouldn't *stop* buzzing even with the ignition off, key out, doors shut and lights off! Just this quiet, sick little 'eeee...' had to put the pore thing out of it's misery.
Possibly related though, I have had before and after a very light power drain, barely anything, off the accessory/dome light/horn fuse. I haven't looked at the wiring diagram in some time, but it occurred to me today that maybe something was wrong with the buzzer relay and *that's* what was making the pore old buzzer go off no mater what, and drain my battery all the time -even with the buzzer gone.
This thread is funny cause it happened to me to! Instead of pulling the fuse,it came out to be the wire on the seat belt buckle grounding out on the surrounding metal. It used to scare the poop outta me when I was driving and a road bump set it off.