Abstract: A self-contained safety and security system and method that performs the multiple functions of theft deterrence, battery saving, battery analysis system, accident protection, and telemetry and control data communication for vehicles is disclosed. The present invention is an electronically-based system for a vehicle having an existing power transmission circuit including a battery that can be readily installed and made operational by an individual having no special training using common household tools. The safety and security system requires the installation of no dedicated wiring in the vehicle. Furthermore, the system preferably installs without any cutting or splicing of the wiring in the vehicle's electrical system.