rear wiper motor re-build?
 

Been searching the forums but coming up empty so far. Lots of osts about buying new stuff and installing it...

My 88 has a rear wiper fitted but the motor can barely move the blade.
It's pretty sad.
Has anyone had success getting one of these motors re-built? Brushes, bearings?
I haven't gone in to look at it so it may just need some TLC but thought I would check.
TY