gauge and radio light dont work on 1995 Oldsmobile Aurora

ihav no gauge lights at all and i turn on my head lights i lose my radio and heater control lights ive tried the dimmer looked at all the fuse cant find the issue please help if u can

Asked by for the 1995 Oldsmobile Aurora
Your alternator is going
How can you tell that the altenator is going based on losing lights on instrument panel and radio console?