In some aspects, a multi-camera device to facilitate multiple camera video conferencing is provided. A signal received through the channel being tested by the test platform is compared with the first signal to determine if the received signal corresponds to the first signal. The current monitoring circuit includes a current sense resistor, a current sense amplifier, a voltage comparator, and a transistor coupled to the voltage comparator for turning off and preventing current from being delivered to the at least one wire corresponding to one of the marker or tail lamp, stop lamp, left turn signal or right turn signal.