I have a 68 FB wiper washer issue. The wiper motor cam keeps turning when the wiper switch inside the passenger compartment is turned on and the washer is not depressed. I have replaced the wiper motor and the wiper switch but it still pumps fluid when the switch is on. When I unplug the washer solenoid the cam keeps turning. When I disconnect the wiper connection it stops, as it should. If anyone can help please let me know or if you have a wiring diagram I would really appreciate it.