I have a 71 Chally with the variable wiper motor PN 3431077. My problem is, when I turn on the key, i get a major draw of current from the wiper motor (in the off position). Also, when I turn on the switch, it only goes one speed and never parks correctly. I've tried another switch with the same result.

Is it just that I need to rebuild the unit or am I experiencing some other phenomenon I'm unaware of? Thanks for any help guys.