Hi Chris, I would suspect the controller if it is near moisture, Another thing you can try is to unplug it and wait a bit and then plug it back in. Sometimes the plugs in the steering column can work loose as well. I don't know about yours but mine has plastic covers that come off to expose the wiring.
I had issues with mine awhile back and removing the plug on the controller and cleaning it seemed to fix it.
I did bypass the wipers on that trip till I got home and fixed the problem.
Dennis & Marcie & Hook The Jack Russell, 2001 HR Imperial 38wds 350 Cummins, 07 Chevy Trailblazer/Blue Ox/Ready Brake, 04 Dodge 3500 Cummins,