Thanks for the auto-range idea. that could be the cause of the short overload reading in the beginning. My FLIR meter has the ability to set the range static which I will try. Thanks Ramen, I will plan to disconnect everything and tone the line to see where it's running. The only explanation for burning up any 12v device I plug into it would be too much voltage/amperage considering I have tried two different 12v outlets (brand new). I will re-wire and call it a day. The toner should help with finding the line. Thanks again for everyone's input.
