The Headlight circuit doesn't typically go through the interior Fuse Block. I would check the high beam circuit at the dimmer. As for Dash and Taillights, those start at the switch then to the Taillights Fuse and from the load side of the Taillights fuse to the Dash lights Fuse. Be sure that you also don't have a bad relay in the under hood fuse block. That's also where you may have one of those large fuses that could be blown. All good stuff to check.
