I had a similar problem on my 92. Motor worked fine but control rods were not moving with the motor. When I removed the plastic grill and got into the wiper compartment, found that a snap ring had broken off one of the control arms. Long story short, I went to a hardware store and replaced the snap ring. Fixed.
If I was you, I'd start with downloading your car's Factory Service Manual here (
http://www.automotiveforums.com/vbul...d.php?t=497839), extract it, then open the pdf for the body (BO.pdf). If I knew how to attach files, I'd just send it to you. Anyway, find the section on Wipers, page BO-68. Tells you how to remove components in the correct order. This is not a difficult fix and the snap ring fix may not be needed for you. Good luck to you and consider sharing the results. I'd like to know how close I am!