My Texicom Bell box just makes a clicking sound

I Have had Konnected original board working great for the last 3 years with no problems and yesterday the outside bell box and siren started clicking on its own , when activated theirs 12volts dc to the box but when inactivated its still showing a leakage of voltage between
8-10 volts dc on my multimeter think this is the reason for the clicking , The bell box seems ok as if I connect 12volts to the siren or bell it works ok ,I’m thinking a fault with the board might put a relay in circuit to se if it helpsany help appreciated.