I basically hate Mopar wipers. My advice is to get ahold of a service manual--you can download them, free, at MyMopar.com, and read up in section 8. Various years have various text on troubleshooting, and some years have a chart showing motor connections and tests, etc.
There used to be a great websited on them, but "I guess" owner ? died ? and the remnants became lazy or dishonest.