For once i am not going to slate Clarkson or say he's wrong, he is correct..
all depends on Bus and fuse box.. here you will have to do some investigation work..don't ask me why the different box has different ampre fuse coz i can not explain it, all i can say is the wiper motor must be slightly different..
if you have a 505B (number is on the face of the box at the top-- opposite end to relays) then originally should be 8 amp right through.
if you have a 505A then fuses 8 and 12 will be 16 ampre (fuse 8 is your wiper feed )
Jon
:roll: