going from the memory ( I need ro reconfirm this info)

i would say that stepping motors are fine... the lights should move:

LHD car, US specs, when parked, engine running, lights on autolight, steering wheel at center

steering wheel to the right

left light turns right about 8*, right light turns right about 15*

steering wheel to the left

left light not moving, right light not moving ( return to center, if they were to the right).

car is moving

steering wheel to the right

left light turns right 8*
right light turns right 15*

steering wheel to the left
left light turns 15*
right light turns 8*

car is in reverse, the lights are in the center, not moving

light switch is in manual - the lights in the center, not moving

Those numbers are nominal, and actual number can vary...