ktmccrackin

I've been searching and searching on these forums but can't find anything. People with tail lights out always have the combination of dash/running/tail lights going out. On my 76 280z just the tail lights are out and everything else works fine. I used a test light over the switch on the solder to make sure the switch was good and that checked out then used it past the plug, that checked out. I checked the fuse and the fuse is fine. Is there anything super obvious that I'm missing? Because otherwise I guess I just have to tear up carpets and the dash and such to find a short...and that doesn't sound fun.