There's a box Velcroed or screwed to the dash under the headlight switch area. This is the magic box that controls the wipers. Check the connections on it, I had issues with the intermittent part of it not working and found it by wiggling the wires accidentally. Try cleaning up the contacts on it and see if that helps.
l We're here for a good time. Not a long time. So have a good time the sun can't shine every day.