63 Dart Mystery Circuit Board Washer

I would not guarantee that washer belongs in the cluster. Also, I don't believe the tail light fuse directly feeds anything in the cluster. The dimmer controlled dash lamps come off the tail fuse, BUT after going through the dimmer they go through the SMALLER INST fuse which should be at one end of the fuse panel.

I believe you are correct. That confuses me a bit though because whenever I blow a fuse for the tail lights the dash lamps also go out. I'm trying to go through this with as fine a tooth cone as I can but seeing some of the patchwork that came before me it makes me wonder if I have a deeper problem from someone's previous, "solution."