I had a similar problem on my 01. It turned out to be the the little plastic snap on ring on the wiper inner arm which attaches to the motor. You have to remove the black grill cover from where the wipers are mounted to access it. It is only a few screws and some push in pins made of easy to break plastic. You can find the part in the HELP section at any autoparts store for about 8 bucks if this is your problem. If its the motor or linkgage go on ebay they have some for sale last I checked this afternoon.