My build is completed and everything works except the extruder motors (xyz, autohome, both hotends, all the fans, heated bed, z sensor, octoprint... all working perfectly). I get no response from either motor using the the machine control and octoprint. I've checked continuity on all of the wires for each motor, and have checked for short circuits between the wires. I also tried unplugging the second extruder motor and plugging it into the Y motor to see if it was the motors themselves (unlikely), and the Y motor did not turn when I controlled extruder 2 (prepare > move axis > .1 > extruder 2). Help???