in the second circuit switched by relay 10 the spark producing current from coil wire 19 is grounded to the chasis through wire 20 and a resistor 32 thereby disabling the ignition of said automobile resistor 32 may be a 10 ohm 10 watt 10 tolerance type such as the archer brand part number 271 132 in the third circuit switched by relay 10 twelve volt current from the automobile 39 s battery 21 is routed through a 30 amp circuit breaker 22 and wires 23 and 24 to the automobile 39 s horn 25 which is controlled as to sound in an intermittant manner through a flasher 26 in the fourth circuit switched by relay 10 twelve volt current from battery 21 is routed through circuit breaker 22 and wires 23 and 27 to the automobile 39 s headlights 29 which are controlled as to flash in an intermittant manner through flasher 28 in the fifth circuit switched by relay 10 twelve volt current from battery 21 is routed through circuit breaker 22 and wires 23 and 30 to relay 10 thereby bypassing the brake and reverse light activation circuits 11 and 15 and rendering spst switch 13 useless manual de activation of the grounding spst switch 18 and subsequent interruption of the flow of twelve volt current thereby becomes the only means for disabling the horn and headlights and re starting the automobile by virtue of the aforementioned system a would be thief who attempts to steal an automobile which has been left unnattended with or without the engine running and the anti theft system on will activate said system by depressing the automobile 39 s.