Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
It sounds like the power steering pump might have gone bad. You would want to do a pressure check on it to be sure. When there is not a p/s pressure tester available, what you might be able to do is, have someone turn the steering wheel all the way to one side, (for about 3 seconds only) and see if the pressure hoses bounces. If not the pump is usually bad. When the pressure is fairly normal, the pressure hose will bounce each time the wheel is turned to the ends.
do you have a procedure chart to help me do it myself, or how much at a shop??
They are showing to be available after market for about $60 and the labor is about 2 hours or so.
Here is a procedure to replace the pump
REMOVAL - DIESEL ENGINE
INSTALLATION - DIESEL ENGINE