Power steering pump, or gear/box?

At the bottom of the column, inside, next to the firewall
you might find an unusual switch. If you do, that may be an assist switch. I forget how exactly it works, but the gist of it is that on-center and a few degrees either way, it does nothing. But as the steering wheel turns farther or faster ( I think), it tells the pump to crank up the boost.
I only ever changed one of those, and I forget the details, so you'll have to do your own research.
I think, the one I swapped out was on a Chevy tho.....