Hi Art,
If moving the arm does not work and you think the air motors are bad you can get rebuilt ones from Rome Truck Parts in Augusta, Georgia at 706-234-6228. I got some from them and replaced both motors and air switches on the dash. My system now works well.
There is an adjustment that can be done on the motor to control the speed.
I love everything on my coach except the windshield wiper system which is a real pain.
I would love to switch to electric but the cost is brutal.
Good luck, Wally
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