Originally Posted by
onehundred80
The siren circuit is buggered up, get a new alarm or leave it as is.
When the siren sounds at random it generally means the PCB in the siren is shot.
Well finally got around to taking the siren apart again, sealed it really well so took a little time. One of the batteries I purchased is completely dead. The board looks good so I may just throw another battery in it. One of the batteries read 3.7 Volts, the other .128 volts. I wouldn't suppose the board would have fried the battery, I think it was just defective?