No interior lights on my 73 vette

I've got no dash lights on my 73 vette. Any suggestions on a fix? My only thought is maybe a fuse, which I haven't checked yet.

It can also be your light switch, if I remember correctly the interior light is turned on by turning the headlight switch right? The contacts in those switches wear out. Make sure all your wires are connected tightly with out corrosion also. Just a couple of Ideas.