Jon

I think you're right about needing two relays. I looked at the wiring diagram for a modern wiper motor with intermittent and it has a park relay. Not need without intermittent, as the OFF position energizes the park circuit, which then opens a switch inside the motor when in park position.
I can send you a copy of that diagram if you'd like.
[on edit] attaching diagram.
Attachments
Interval Wiper diagram.pdf (25.75 KB, 7 downloads)

Last edited by klhansen; 04/08/2020 8:18 PM.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.