I found that my wiper switch was bad (wiped in delay no matter where the knob was turned, even off). Not sure what caused it but after some troubleshooting I figured I needed a new switch. My switch has Off/Delay/Low/High selections.
I removed the old switch and found the part number on the back: Wiper Technologies #75600-06 (see attached picture)
The switch has a mfg date of 02/18/2002
After searching for this switch I found that this exact part number is not made anymore, there are various versions of that number with different connectors on the end. The connector used in my Holiday Rambler isn't one of them. (See attached picture)
I bought a Cole Hersee part number #75600-04-BX. It is the same switch with no connector, just wires coming out of it. I cut the connector off the old on and crimped the wires together color for color. The new switch has the wires coming out of the unit in a slightly different order, but still wires color for color.
After plugging the connector back in everything works great.
it mounts in the same hole and has the same symbol on the front as the old one.
I found my switch on Ebay, but if you put the part number in there are a number of places that sale them for a varied price range.
Hope this helps someone.