One of the original Sprague Devices air-operated windshield wiper motor failed on the Regency. Both new and rebuilts are available from Rome Truck Parts in Rome Ga.
I bought rebuilts, $149.00 plus $20.00 corecharge refundable if you send them your old one.
Not a big deal to change out yourself. You don't have to drill out the rivets that hold the wiper arm bracket in place on the outside of the coach. Just remove the arm and the big shaft nut on the outside and the 4 bolts on the bracket up on the inside of the front body panel, accessible thru the big front grill door.
Don
www.rometruckparts.com
PHONE: 706 295-4345
Part # AP7/08506/2104