a sensor circuit device for detecting an open circuit to an electronic component is disclosed . the sensor circuit includes a detector circuit operatively coupled to the electronic component , with the electronic component drawing a known current and with the detector circuit including an energy storage component . a charging circuit is arranged to charge the energy storage component , and a processing system is operatively coupled to the detector circuit . the processing system is arranged to monitor the voltage across the energy storage component , and the processing system determines the fault status indicative of an actual current drawn by the electronic component .