The TruckMinder constantly monitors your vehicles exhaust system using two micro controllers which continually communicate with each other creating a "heartbeat" signal. Any interference interrupt the heartbeat causing the main TruckMinder controller to increase its alert level. Continued disturbance of the signal will cause the alarm to trigger.
The TruckMinder Arm / Disarm Door Switch Cable Is An Additional Option For The TM1 / TM2 System