sparking

Hi, My 2003 Vito is making a sparking sound that appears to be just inside the offside wheel arch (at least, that's where it's loudest) when the engine is hot, and the radiator fan never spins anymore. Are these two things related? Anyone know where the fuse is for the radiator fan, as I can't...

I'm normally pretty adept at sorting out mechnical/electric problems, but this time I'm stumped. I've also learnt over the years not just replace electronic parts until I can prove that they are dead first (especially when very expensive!). Anyway, here is the history: I go to start the...