Tomorrow, we are leaving for San Antonio. I didn't want to have the non working strobes in the back of my mind for a week. So, after I finished packing for the trip, I headed back to the hangar. The problem turned out to be SUPER SIMPLE. I had connectd the strobe power unt to the wrong wire. I ran a temporary wire back to the unit and the strobes fired right up. When I return I'll change the wire connection. (I ran two extra to the back and hooked up the wrong one.)