Can someone tell me what the wire #28 and #63 do on the below wiring diagrams (ones that go into the wiper motor)? I have everything else figured out. The first diagram is for a 69 cougar and the second is for a 79 F150. None of the mustang diagrams I could find actually had the internal stuff shown for the wiper motor....just four wires going to the motor.
From the first diagram, it appears when #28 and #58 of the wiper switch contacts close (as well as #763 and #63, the wiper motor "parks". So if there is 12v to #63, it keeps the switch open inside the wiper motor so that it doesn't run. Is this like reversing polarity so the motor turns the opposite way and holds itself in "park"? Then, when the power is switched away from 63, the switch inside the motor opens to the run position and power is pushed to the high or low speed legs of the motor (#56 or #58)?