Guess I'm in the same boat of not knowing with 100% certainty Johnny, but I would think that since it's an electric wiper, one of the usual methods of converting to intermittent would work?
Namely, either one of the switches with the build in circuitry for that function, or one of the tried-and-true old Ford modules connected to it's matching switch. The most common ones used were from the late seventies trucks, but I would imagine that later ones would work too, if the connections were the same. Or you could modify one to work even then too I would think.
Just don't know I guess. Hopefully someone will chime in with their experience with this. Meanwhile subscribing and back to the top.
Paul