Abstract: The present invention is an alarm triggering circuit for use in an alarm system for a motor vehicle having an alarm, a power source and an ignition system that provides a positive voltage when it is turned on and a ground when it is turned off. The alarm triggering circuit includes an alarm setting circuit which sets the alarm triggering circuit and a delaying circuit which enables an operator of the mot or vehicle to exit it. The setting circuit includes a first timer chip whose output is normally positive and a first transistor which when it is turned on provides a ground to the input terminal of the first timer chip. When the ignition system is turned off, the first transistor is turned off thereby causing the output of the first timer chip to go to ground.