Hey Guys! I just got a refurbished Powerspec pro from Microcenter. The right extruder works as it should and prints great, but the left extruder motor turns in the wrong direction. While loading filament, it actually unloads. If I unload the filament, it will actually load. While trying to print, the material just comes out....

Has anyone else had this happen? I'm guessing they have 2 wires crossed somewhere and the polarity was reversed to the motor. Any suggestions before I pop open the cover and start tracing down wires?