You can check each phase of the motor at the connector for the motor at the control module with a DMM. Each phase should have a resistance that is less than 20 ohms and they all should be relatively close to one another. Also check the continuity of each phase with respect to the motor casing. Each phase should read O.L. or infinite meaning that there are no shorts in the motor winding to the metal casing of the motor. Finally, it's the control module (bell end) that usually fails and not the motor itself.
how do you test each of those possible faults?
You can check each phase of the motor at the connector for the motor at the control module with a DMM. Each phase should have a resistance that is less than 20 ohms and they all should be relatively close to one another. Also check the continuity of each phase with respect to the motor casing. Each phase should read O.L. or infinite meaning that there are no shorts in the motor winding to the metal casing of the motor. Finally, it's the control module (bell end) that usually fails and not the motor itself.