Hey Matthew
To test a fuse you can either set your multi meter to Continuance (BUZZER if it has one) And put a lead on each end of the fuse and it should give a buzz. Or set it on ohms and you should get a 0 reading
Sorry for my n00biness Daniel, but does one end of the fuse need to still be in the fuse holder or can I pull the fuse out and test it in isolation?
Matthew