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So your controller has a 35 pin plug on the side of it and plugging in to that plug is a wiring harness, correct? and it's on that wiring harness that you are missing the one wire?
If that is the case then it sounds like you need a new wiring harness/pigtail.
As I understand it the hail effect sensor is assuming that the winding's are hooked up correctly and it is the hail affect sensor that is telling the controller where in the rotation the motor is and the controller it's self is making it rotate a given direction, that is why it only takes one wire to tell the controller to change directions.
so to get it to turn the other way you need a new wiring harness pig tail.
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