The sole purpose of the Power Steering Pump is to make steering easier. If you have ever driven an old vehicle without it, you will understand the difference turning the wheel. The power steering pump also servers as a safety mechanism to reduce over correction when you are faced with an obstacle.
Like all mechanical components, the power steering pump can develop problems over time. The telltale signs are normally stiffness when turning the wheel, or strange noises such as clicking or rattling.
Before you rush out to replace your power steering pump, check to make sure there are no blockages in the pump, low fluid levels, or leaks in the steeringlines.
If you are still experiencing steering problems, it is most likely the power steering pump will need replacing.