If its making a horrible grinding noise, it could be the bearing!
have steering pump checked sounds like it is wearing out
Turning to the right, when going forward, you turn the steering wheel towards the right.
When turning a PWC steering cable right it will go left. If you turn it left it will go right.
By turning the steering wheel in an anti clockwise direction.
That would be the inside diameter of the circle created by turning the steering wheel completely left or right.
The problem is probably in the steering gear. Clogged passages in steering gear. Leaks in steering gear.
It probably needs steering fluid.
Low power steering fluid or you need a lube job.
Many things can cause that, the simplest cause being lack of power steering fluid.
probably not the alternator if it happens when only turning its gotta be the power steering or steering rack make sure everything is greased up could be the PS pump going out
try turning the steering wheel to the left or right and holding it there while turning the key
The drive shaft may need to be tightened