steering moving back and forth when idle in gear

[somervillearron]

hi

today i noticed if i have my car in drive or reverse,if i put my finger on the wheel slightly turning left or right i mean just the slightest ammount of pressure with one finger you can feel and see the steering wheel move left and right like pulsating!

i am also having a belt squeek issue not a slip but a squeek could this be the sighn of a faulty power steering pump or warped pulley? there is no issues when driving and if you dont touch the wheel when sitting still the car tracks straight and everything although there is a dead spot and a balljoint needing replaced (same issue) could this be the cause just the fact theres play and the power steering moving against the loose part if you get what i mean

sorry crap at explaining stuff

[cheshired5]

Check the colour, level and clarity of the PAS fluid.
No vehicle details so difficult to add more.