Thanks, CP. It's funny you mentioned the door open. When I pulled one of the fuses and then checked with the test light, I got a solid light (WTF?) and then I realized that having the door open made a difference. I'm looking at the wiring diagram and I see that the clock comes directly off of the big black wire from the dash ammeter (no fuse), and the voltage limiter comes directly from the unfused center of the fuse block, so the fuel gauge and temperature gauge work without the fuses in.
Mike, I'll maybe disconnect the clock if all else fails.
Thanks Andy. No foil found yet.