2003 Injector Voltage
 

Ok guys question here before I confirm whats wrong so I was testing some injectors for a guy with a no start problem and I got 15 volts going up to the injectors last night except one maybe the worng way to test but just a guess well tonight tested again and now have no voltage going up to any injectors? Could this be a ecm problem a dumbass not know what he doing or we throwing a wild guess out here? Help please