Heres A Funny One. Wipers

So Today I Started Laying Down A Little Primer On The Valiant, And I Lifted The Wipers To Slide Paper Under To Mask Thw Windsheild. Well I Finished The Primer And Took Her For A Drive And Just My Luck It Started To Rain! Completely Out Of Nowhere. When I Turned On The Wipers The Passenger Side Didnt Work. So I Pulled Over And Checked It. Th Wiper Arm Now Moves Freely In Any Direction. Does This Mean It Came Of A Gear Or Something. I Have Never Had To Work On Wipers Before. Any Help Would Be Greatly Appreciated. Thx