I was losing P/S fluid and getting a loud moosing sound whenever I turned the wheel. I thought I had burst a hose or something when a 'helpful' mech 'topped-off' my P/S resevior...
I ended up being a lose hose to pipe connection down by the catalytic converter (found it when replacing cat). Get under there and look for where the leak is coming from exactly (lots of clearish oil around).
I fixed my leak with a couple of twists of a wrench and a refill on the P/S... No probs since.
Good luck.