The passenger side front tire may be rubbing on the inner fender.
check the power steering fluid level...if its good, have power steering checked out
I have a similar issue with my Stratus, except instead of humming, mine rumbles slightly. This answer is only speculation, but I believe that it happens because the power steering is stretched to the max while turned completely to the right. You'll hear a humming noise because the hydraulics are trying to pump even more fluid in order to turn further, but there isn't enough fluid in the system. Alternatively, your passenger-side front bearing could be worn out, but it would be much more noticeable than just a humming noise.
The teenager had such a fear of driving that she was gripping steering wheel until her knuckles turned white.
The driving lights on a Volvo xc90 are turned off by turning the knob on the left side of the steering column. Driving lights are used to notify other driver's of the vehicle's presence.
It may be in need of lubrication.
The back of the PWC is pushed to the left when a PWC's steering control is turned to the right.
You have a bad cv joint. Or bad wheel bearing on one side.
With a Little Passenger Seat, most 5 passenger SUV's can be turned into an 8 passenger SUV
You might be low on power steering fluid
The steering wheel was turned.
The steering wheel was turned.