Low hum whining sound coming from the front end?

I don't hear it when I am driving sometimes at idle and all the time when I am turning the wheel both right and left. Known, a bad steering column with lots of play. Fluids are good. I have replaced the steering fluid pump, serpentine belt, and spark plugs. I can do the basics but I don't have a place to work on it and leave it undone so I have not attempted to get under and go through what might be causing it. If I could narrow it down and feel that I could tackle it I would like to do it myself. I just need to know where to start looking.
Thanks in advance for your time to respond.
Angela