OK, so here's my problem: Bought these from China for a customer but it turns out the leads are not correctly matched to the coils according to the wiring diagram. I know my customer is not the problem because the other torque sizes work fine and he knows what he's doing when it comes to wiring motors.

So I managed to find the correct pairing in parallel config by trial and error which I confirmed by being able to rotate the shaft by hand for each of the four pairs. But that leaves me unable to arrive at how to order the pairs to A A- B B- to connect to the drive.

What baffles me most is that when I check the resistance of the pairs the multimeter shows the rated resistance of series config. In fact, all the of the eight leads give this same value. And no matter how I pair them--same thing.

Any help/advise would be greatly appreciated.