Yesterday while driving, i lost all power steering and power brakes (you would automatically think Booster). I pulled over, popped the hood and fluid was spewing from behind the power steering pump somewhere. I limped the truck home about 20 miles. I checked brake fluid and it was full. checked power steering fluid and it appeared to be empty. Yet when i added fluid it took less than a half quart. I started the vehicle to pressurize the pump and find the leak. Yet the pump never pumped any fluid. (one would thing pump was out) I am baffled as to if the pump went out, why fluid loss? If the booster was out, why do i still have brakes just without power assist? Andif a hose is blown, why such small fluid loss? I dont want to just start replacing parts till it get the right one

 

You may just have a lot of air in the power steering or and quite possibly the pump is shot and won't pump enough fluid to purge the air out or show where the leak is. At the age of your truck I would just go ahead and replace the pump and the hoses (both high press. and return) and go from there. I have even seen rebuilt pumps that didn't work right out of the box. You still have brakes because the brake hydraulics are a separate system from the PS hydraulics, the only link is a mechanical link between the booster and master cylinder.