I have a 02 Taurus that has become hard to turn and has a squeaking noise somewhere under the hood. If I jack the car up and put it on jackstands it turns easy like it should. But with it on the ground, it takes some effort to turn the wheel. I was thinking power steering pump, but wouldn't it turn just as hard with it on the jackstands if the pump is bad? Anybody have and idea of where to start? Thanks...........