They're in the left dash fuse panel - if you have heated washer jets, that's 20 (5 amp) and the wiper system is 38 (30 amp). The headlight washers are fuse 36, so it'd make sense for them to still work even if the wiper system fuse is out.
There doesn't seem to be a separate fuse for the windscreen washer pump, but I could be wrong. Note that if the wipers work and the washer doesn't, that's probably a shot pump if it's not on a separate curcuit.
-S