Help: no power to panel lights on fuse box?

[Mbeef61]

I have a 71 chevy stepside. Everything was working a year ago. Sat for a year. Brought it back out. Everything is great but the instrument cluster lights dont work. All other lights work. Signals work both outside and inside indicators. Gauge lights do not. Red brake light works upon startup. Just not the gas gauge, speedo etc. Tried fuses, no success.

Multimetered the fuses by putting negative to chassis ground and positive to fuse bottoms, all but the PNL lights (top right) fuse shows around 12.5 volts with truck off. This is correct? Also ohmed out fuse and wires from instrument cluster to fuse box and got a good signal (that indicates no short correct?).

I am wondering why or how I could be getting no power to one spot on fuse box? Any ideas?

Also, fuse box says 3A in some spots, like PNL lights...that is 3 amps fuse correct? PO had a 30 amp in one of them, but it wasnt one being used. Probably just holding an extra...but 3A requires a 3amp fuse right?
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