Check your front trunk and make sure it is not open. This is a warning as stated in the owner's manual.
I cannot explain why, but after I have had my wipers off the car for a while, and then put them back onto the car, it takes a few minutes before they run at any setting except max. And with the wipers off, they cycle only in max and this makes it a bit more a chore to get them on correctly.
Pete S.
(note to self, move out to Jeff's neighborhood and leave them on)
can't help, mine has never been in the rain and I have never turned them on.
You really need to read your owner's manual and catch all the nuances.