Wipers stopped working!!

There's only one answer, and that is to follow the troubleshooting steps in the factory shop manual.

Download thread:

http://www.forabodiesonly.com/mopar/showthread.php?t=244981

If you go to the MyMopar link, there's a 68 Plymouth manual there, see post no12 on that thread

The manuals at MyMopar don't utilize proper page numbering, they are consecutive. Index to the electrical section is on page 227

Wiper system starts on page 301

Specific tests start page 308. READ THAT carefully!! Be certain to pay attention to 2 vs 3 speed, they are different