Squeal when turning steering wheel at idle

1997 Ford F150, V6, 4.6L. 136K miles. Has a loud squeal when turning the wheels (both directions) when at idle speed. Checked ball joints and other control arm parts and everything looks good. Belt looks fine also. No leaks and PS fluid OK. Steering is not hard at all and actually smooth (all the time). Any ideas ??

if you are referring turning wheel to full in each direction, i think this is normal. The belt is slipping under such conditions.

I’m referring to squealing as soon as the wheel is turned (either direction) and not to the full direction, but any turning at all

Your belt may be good for now but it could be the tensioner is shot.