2016 S with 140k miles here. Had combo switch on steering wheel replaced thinking it was issue. Nope. Thinking motor now. Symptoms are intermittent won’t work on any speed, sometime just works on high, other times works normal then stops. Motor does sound a bit whiny and wipers seem slow. Is this just replace the motor or better to just do the whole linkage with trans and all? Thanks.

 

FYI, turned out to be motor and trans that was failing. Replaced and all good.

 

Did you replace them with new components? Thanks for the outcome report.