Wiper switch please help

My standard answer about the wiper systems........

1....Go to this thread and read through, and go to MyMopar and download yourself a shop manual. Some of them there are due to the guys on here, INCLUDING THE 72 MANUAL

Free service manuals

MyMopar - Mopar Forums & Information - MyMopar Tools/Reference

2...Go to the "Passion for Mopars" site and dig around. There's all sorts of info on wiper systems there

Welcome to Passion4Mopars - Because Mopars Are My Passion Too

"Generally" there are (older) single speed, variable speed and three speed, and they vary some over the years.