The present invention extends to methods, systems, and computer program products for wireless takeover of wired alarm system components. Embodiments of the invention can be used to bridge hardwired alarm zones for use with a wireless alarm controller. Wired sensors are wired to a takeover module that converts communication from the wired sensors into wireless communication that can be compatibly processed at an alarm controller that accepts wireless signals. Power and ground connections from an existing wired alarm controller can be used with the takeover module to facilitate wireless takeover of wired alarm sensors.