I have a 1990 Ford Mustang gt the dashlights quit working and the taillights now do not work?

What do I need to do to fix this, or has anyone else had this problem? I checked the fuses and it is not that.

Check for water in the tail lights (its a very common problem) and the dash is definitely a fuse (try checking carefully and make sure you have the right fuse)

Theirs no water in the lights. All fuses are good and the right ones. The brake light works just when you turn the headlights on the dash light or the taillights don't work. But the breaklights do?!