Wiper wiring

One thing you need to do (if you have not) is get into the text of the wiper section in that section 8. That section has testing procedures and charts showing what happen in the various motor /switch combos. Unfortunately I don't have a complete 3 speed system to "dissect"

"Used to be" the "Passion for Mopars" site had some good wiper electrical info. There have been posts they are no longer dependable, It don't know what the issues are there.