2001 Dakota wipers won't shut off.
 

Wipers won't shut off unless I pull the fuse, or shut truck off. I replaced the multifunction switch, no help. When this first started, I squirted WD-40 in the ignition cylinder and it worked fine for about a week. Sometimes when I would jiggle the key in the ignition when it was running it would go off. Now nothing helps. Any ideas? Truck has 65000 miles on it.