I recently upgraded my Uber scoot to a 72 v 3kw motor with a shunted 50 amp controller with mosphets capable of120 amps I crashed the other night and motor won’t engage unless I put my neg on tester to neg battery and touch while wire on throttle then turns slow medium fast and says I don’t have continuity in my positive wire but have full power to controller and 59 volts to phase wires and voltage won’t go up or down with engaging throttle any educated insight would be helpful.