[MPaulHolmes]

Hi Voltmatic automation! I would first disconnect B+, B- and M- from the controller, so there is no high voltage there. And don't forget to discharge the capacitor bank. 120v in that bank can kill you. You definitely don't want to begin the debugging process with power hooked up. With the top off of the controller, measure voltage from any of the gate resistors to PH1 or PH2. First with zero throttle, and then with non-zero throttle (it doesn't have to be full throttle). The voltage should change from 0v to 12v. Check that first. If it stays at 0v, then there's a problem on the control board, and we'll keep backing up until we find the bad little culprit!