wiper switch

Well i finally got back to the problem last night. the switch is the culpirate, i checked the harness at all the connectors and did a continuity test on all wires every wire was ok . A couple of connectors did not look that great and they had a bit more resistance but i cleaned them all. Than i opened up the switch ! it was green inside on the switch points. I am replacing the switch.
thanks for the help.