My battery died yesterday so i had to jump start in order to get home from work, bought and installed a new battery this morning. My wiper now stutters, or doesnt work at all on the slowest setting, works fine on any other speed. Any ideas? Could it be something as simple as a blown fuse?

common fiat problem; may be connections on wiper motor need cleaning; but motor/control unit/relay probably damaged by power surge; may settle down or you will either have to live with it or replace motor (easy DIY)

Almost certainly a power surge through the relay. As above mentions. Cheap and easy to change.

Thanks, gremlins seem to have disappeared... for now

Bugger is guaranteed to come back right on mot! Sods law.