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Re: troubleshooting old alarm, worked perfectly till this am....
Opposite the magnet, there will be a contact. If you remove it from the
door/window frame, it will be connected to two wires.
When the contact is in proximity to the magnet, the tiny reed switch
creates a "short".
By removing the wires from the contact and shorting them together by
twisting the bare copper ends together, you will mimic the action of a
properly functioning contact with the window closed.
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