Needing some electrical help

[happysupraowner:)]

I just picked up a sweet 86.5 hardtop today, I'm in love with this car. Needs some tlc but thats what they are for. Everything works fine on it, so I thought. My taillights, parking lights, and dash lights are not working. I checked every fuse, all of the are good. Its getting power everywhere. I'm kind of stuck right now as far as what it could be. I either have a wiring issue, or it is the actual headlight switch. I'm not sure which it could be. I'm a mecp certified installer, I deal with electrical all day, but have never actually messed with a headlight swith Thanks in advace.