RepairPal's independent, master mechanics track down the best of the best in auto repair. Learn more »
Get the latest advice about your car
How to fix outside clunking noise on passeger windshield wiper which won't wipe but moves irradically.
Sounds like the linkage for that wiper is loose or defective. Need to pull the cowl to inspect it.
here is a web site that has repair instructions for the job you are doing: