I developed a leak at the pressure switch just before I got home and managed to make it home. I changed the pressure switch and topped over the power steering reservoir to the correct level.
When I started the car, it had the obvious noise from lack of fluid which got better and the rough steering went away. I drove the car about 10 miles but the whine and growl is still there. Is there air in the system casuing the noise or is the pump going bad.
It drives fine, just noisy.