If it looks like this picture, which it should do, only 3 are in use, 2 are spares. [ Guests cannot view attachments ] The fuse blowing is normally down to dirty fuseholders, which should be clean and bright, or dirty connectors in the block plug where it joins the loom. You need to make sure the the brass connectors in both parts of the plug are clean and bright as well. Dirty connections increase resistance, which in turn increases electrical load, which blows the fuse.