Nema 17 stepper motor(ks42sth34-1504a) not working
There is a common pinout for bipolar steppers as follows:

Coil A
NC
Coil B'
Coil A'
NC
Coil B

That doesn't really match what you  say you are reading. While center-taps are possible, there needs to be two coils for this kind of stepper to have a hope of working (there are single phase steppers but they are used only in specialized applications).