Tires out of balance, Bad tie-rod ends. Steering stablelizer shock, Bent wheel, Belt broken in the tire. Bad idler arm. I would have the front tires balanced first.
One or more tire out of balance, a bent wheel, or defect in a tire.
Get you front end aligned, that should take care of the shakes.
have your front brakes checked
Yes, it is possible. Any loose/worn front end part can cause steering wheel to shake.
I would replace the turn signal switch.
I would go and get the tires balanced, FIRST. You could have front end parts worn too. Check and replace as needed.
warped rotor
Get new front brake rotors, there cheap.
My guess is you have a tire ply separation going on. Check your front tires.
have front suspension checked
you might have run out on your rotors as well as bad balance on your front tires.
Tires or wheels out of balance?