Originally Posted by suzook
No power=no draw...plain and simple...no magic here.
Pin 16 has Power regardless of key switch position. So a switch in-line of pin 16 wire will definitely remove the 12v power , What I am curious to know is does it draw current from the 12v or the 5v ? And also if a switch is installed in-line and that switch is off upon starting car will it cause any lights due to the fact the communication wires are still connected to the OBD port but no power is on the range device to allow it to communicate ?