the buttons and horn and stuff on the steering wheel slide on electrical contact strips behind the wheel... theres a coat of lube on this that can wash off with time and lots of Amor All down behind the steering wheel.. A little WD-40 sprayed into the switches and behind the wheel will probably fix this... Good luck.. also read the section on replacing the Horn Ring in a manual to get a picture in your head.. Everyone should have a manual for their vehicle, and the local library should have a professional shop manual available to make copies of for FREE...make the time to take time to read up on your vehicle, and work like the PRO'S! Good luck :) Dave Check the serpentine belt tension.
ummm power steering
ball joints or tie rods
A bad bearing can cause can the front end of car to make a squeaking noise when turning steering wheel either direction. It can also be caused by bad suspension.
Most likely it is low power steering fluid. Check fluid and see if noise goes away.
could be struts and or strut brg plate that mounts the strut at the top
The most common cause for a squeaking noise when turning the steering wheel on any vehicle, including a 2001 Toyota Avalon, is the belt that runs the power steering pump. If the belt is fairly new, a small drop of any dish soap on the belt while the car is running will clear up the noise. If the belt is worn, it needs to be replaced.
Any bushing, if its worn or old enough, causes suspension squeaking at low speeds and when going over bumps. The typical cause of squeaking noises when turning the steering wheel is low power steering fluid. The power steering fluid reservoir should be checked and the fluid topped off if it is low. Fill your reservoir with manufacturer-specified fluid (or have your oil-change service station do it). With a very low fluid level, the whining sound will be accompanied by a difficulty in turning the wheel.
The problem is most likely a loose belt, this will happen when steering piston and pump is under a load as in turning. More torque is required to spin pulley.
Worn ball joints?
If the sound occurs only when turning, (left or right) the most likely cause is a loose power steering belt. First check to see if the belt is tensioned correctly, or in need of replacement.
Many things can cause that, the simplest cause being lack of power steering fluid.
A bad alternator. Turning the steering wheel all the way is very demanding on the power steering which draws power from the engine and can cause the idle to dip down. A weak alternator is usually the cause for the stalling.