Hi have the sister ship (Itasca Horizon 40AD) and I too have my wiper motor on watch. Or maybe it's my wiper switch on the steering wheel? I hope not.
I doubt the wiper motor has seen that much action, but it is a 15 year old vehicle (soon). In my case, the "Intermittent" wiper button and function works fine, but the "Wiper ON" button is acting up.
This just started. And I do not have a solution as I stored the RV for the winter. But it is on my radar for this April when I pull the coach out of storage.
I am very interested at knowing what do do about this problem...
All I can add is that my "Wipper On Button" sometimes works and sometimes requires several quick pulses to get it to turn on.
Further, I believe the function of this button also controls the wiper speed. ...And you do that by pressing it in rapid succession. So my guess, without looking closer at my problem, is that the steering wheel (aka "Smart Wheel") is the source of the problem. ...But the switch talks to the relay. And the relay I believe has higher odds of failure.
Can anyone explain how the wiper speed (Low/High) function works and or has a schematic of the "Smart Wheel" wiper function?
I all know is that the Freightliner "Smart Wheel" is an OEM System Freightliner buys from someone else, but again I don't have more to add in this area.
So I will stay tuned to this thread and remain hopeful someone can help us figure out a "fix" to this wiper button or relay or motor problem?
2004 Itasca Horizon ISK-40AD, 350HP Cummins 8.3L
75K miles and the best of 3 Diesels I have owned thus far!