1989 420 SEL-Turn signals all stopped working at same time, although emergency flashers work. I opened fuse box to check on fuse, each fuse location is numbered, however there is no diagram inside box. The fuses looked visually okay, but I had not seen this type of fuse before, so I am uncertain. 2 questions: Where can I find a copy of the fuse box diagram? If it's not the fuse, what else should I be looking for?