My '67 Fury III with 2 speed wipers do not park when I turn them off. They stop wherever I turn them off. I try to stop them at the bottom of the windshield where they should be. Also when I first turn them on I have to switch them on and off several times for them to work. Does that sound like the dash switch or the internal park switch? Thanks for any info.
John

With the key on, get the wipers to work then shut them off wherever they may be, then go out to the wiper motor and test for power at the park terminal, should be power there. If no power, then it's the switch or wiring, if power there but not parking, then it's the internal park contacts or motor brush. Try that.