Quote
Dust
Firstly wiring... any color based wiring guide you are using is probably wrong. Find out which wire pairs are one coil with multimeter.
On the reprap end the plug is pins 1 and 2 are coil A, pins 3 and 4 are coil B, A and B doesn’t matter, it will just reverse the direction.
Just an addition: If the stepper only vibrates and all the above mentioned steps have been checked, you can switch wires 1-2 or 3-4.