I have a '69 FJ40 with badly hacked wiring, I've repaired all of it except the wipers. I just started playing with them, and after cleaning and regreasing the linkage thery work. But, I don't understand how the park works on this motor. As with most the wipers have an ignition hot (blue), and are actuated by grounding at the switch (blue/white or blue/red). The fourth wire is blue/black. The plug at the switch is gone, so I can't tell how it was wired to the motor, and my scematics do not go into the motor and switch, they only show the wires connecting to them. Any help would be great, thanks!