[Travis Hoffman]

I assume you checked the continuity of the cable with a meter, but FYI, in recent years we've found that the male end of the PWM cable sometimes engages very poorly with the connector on the speed controller, even if it seems the connector has been inserted all the way. We've had to pull them out and reseat them several times to get everything to work. Luckily, once seated properly, we haven't observed any intermittent problems after that.