Cadillac Repair: Power Steering, flow control valve, high pressure hose

Question
QUESTION: I bought a 93 Cadillac Deville about 2 weeks ago and the power steering went out about 2 days ago just driving down the road. I have refered to a Haynes manual but it has not help me. I have no idea what is wrong with it. I did check the power steering pump and it is working just fine. I will tell you that before the p/s went out the p/s fluid level was and the fill mark whether it was hot or cold and now it is over flowing. Please help.

ANSWER: Just HOW did you determine the pump is working just fine ?. The ONLY way to tell is to install a power steering pressure gage.

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QUESTION: I thought it would be working fine since when I had it in the air today and when I cut the wheel all the way it pulled on the motor plus it sounded like it was fine and when I did cut the wheel it started overflowing badly.

ANSWER: If you had a pressure gage on it. you would now for a FACT what the problem is.

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QUESTION: Could it be the power steering pressure switch?

Answer
NO, The power steering pressure switch is used to increase the engine speed when you turn the steering wheel.

You could have a faulty FLOW CONTROL VALVE which is located in the pump where the high pressure hose is attached. the nut on the high pressure hose goes into a larger 1" nut. If you remove the pressure hose and the 1" nut the FLOW CONTROL VALVE will be seen. You can TRY a new valve.