It might help, if you could put your RV info in your sig.
a while back, there were problems with some of the WH chassis windshield wipers being faulty--turned out to be the connector plug , near the motor, not seating and sealing properly. Do a search on the Workhorse chassis forum for windshield wiper problems.
04 SeaBreese LX 8341 / Workhorse W-22 / GM 8.1 / Allison 5 Speed / Brazel's ULTRAPOWER Upgrade/Taylor Extreme Service PlusCables/DIYCAI
06 Honda CRV4/SE/all wheel drive with Falcon II / Roadmaster 9000 Braking System