Thanks for the reply. Yeah, if I could sense the current through the load that would definitely work, but I can't think of a good idea to do it. All loads are driven by DC. There is about ten loads and the current for each ranges from 50mA to 20A. Each load would be driven by an individual solid state device, most likely MOSFET. I need to conserve space, and with ten different loads, if the circuit is too complicated, it would require a lot of parts and space. I was trying to find a spot on the load driving circuit that I could check the voltage of with the uC to determine if the circuit opened.