Windshield Wipers

[CanyonLakeCheyenne]

hey guys any help would be greatly appreciated. i searched for similar posts but didnt really find my problem.

i took the wipers off so i could paint the piece between the hood and windshield. anyways, ive got one of the wipers back on..

when i turn my key over the wiper jumps a little bit but then stops.

when i try to turn the wiper on with the knob, nothing happens.

so the only movement im getting is when i turn the key over.

if anybody could help me out i would be really really thankful.