Headlight switch backlight dimmer blows horn fuse...???

OK all the oranges are "dimmer controlled" feeds to the dash lamps. The functional path is tail fuse.........headlight switch.........through the switch park/ tail section...........to the dash dimmer............out on a tan wire........to the fuse box........through the inst fuse......out that fuse on all the orange wiring

Courtesy / dome, same thing pretty much. Some cars have lamps in the console to light the floor, some cars have a lamp up under the dash to light the floor