Vehicle security system based on two step communication range between transmitter and receiver

A method of selectively controlling a vehicle alarm system, comprising the steps of:

• first, adjusting a variable feature of a first transmitter to define a first short distance;
• second, from said first transmitter having a sufficient power source, communicating a first control code said first short distance;
• third, receiving said first control code with a receiver and responding to said first control code only if said receiver is within said first short distance of said transmitter;
• fourth, programming said receiver to respond to a second control code and not respond to said first control code;
• fifth, from a second transmitter having a sufficient power source, communicating said second control code a second distance which is longer than said first short distance;
• and
• sixth, receiving said second control code with said receiver and responding to said second control code if said receiver is within said second distance Of said second transmitter.

A method of securing a plurality of vehicles, comprising the steps of:

• attaching a security module receiver in each of said plurality of vehicles;
• programming each said security module receiver to respond to a common code;
• transmitting said common code from a first transmitter located at a first point;
• selectively responding to said common code from said first transmitter wherein only security module receivers within a first short distance from said first point respond to said common code from said first transmitter;
• programming a selected security module receiver of one of said plurality of vehicles to respond to a unique code and not respond to said common code;
• transmitting said unique code from a second transmitter located at a second point;
• and
• responding to said unique code by said selected security module receiver, wherein said selected security module receiver responds within a second distance which is longer than first short distance from said second point.

A security system for use with a plurality of vehicles, comprising:

• a first transmitter for receiving a sufficient power source and operable to transmit a first control code a first short distance;
• a second transmitter for receiving a sufficient power source and operable to transmit a second control code a second distance which is longer than said first short distance;
• and
• a plurality of security modules for connecting to respective ones of said plurality of vehicles, wherein each of said plurality of security modules comprises a respective receiver selectively responsive to said first and second control codes.