I have a similar problem (rear wiper works but no washer fluid) and was very quickly able to diagnose the fault as being nothing to do with popped joints - mine leaks from the black cap attached to the wiper motor housing where the pipe fits into. It has two little slots in the cap body (designed to be there) where the washer fluid flows out from. I assume this is new wiper motor job unless its possible to replace internal o-rings - any ideas on how much the motors cost? I guess its probably cheaper just to de-wiper it (i'm 75% of the way there anyway!).