Sounds like you have a broken passenger side linkage. Since both blades are connected to the motor at the same place, if your driver wiper is working then the passenger linkage may have come off or is broken. Don't keep using them until you can get them fixed -- could cause more damage. If you have any luck you may find that the fastener screw has come out of the passenger side's linkage -- it is located under the passenger side wiper arm shaft (small arm attached to the main linkage) -- and still under the air inlet grille.
The wiper motor and linkage is under the air inlet grille panel. To get to it you will need to take off the hood seal, the wiper arms, 4 fasteners, the washer nozzles, and disconnect the washer tube. If you've never done this before take it to someone who has.
Last edited by Red07SSNA; 09-28-2008 at 04:33 PM.