I've had a wiper stuck on after TO in moderate rain once.
Fortunately the rain was widespread so there was no w/s
damage after holding and returning to departure airport.
I looked for an appropriate c/b too but couldn't find any.
Engineer later told me as long as one observes the 230kt
limit the motor will continue to run without risk of burn
out in dry conditions. Any screen damage was moot as
we were always in rain at the time.