Instrument panel lights are out...

[Truckstr]

I thought it was the switch (headlight), but I replaced the switch and... still nothing.

I recently replaced ALL of the wiring (forward light harness, engine harness, dash harness, intermediate rear harness, rear harness) and all was working fine for about a week. All of a sudden I pull the lights on one evening and... no dash lights.

All of the bulbs are fine. All of the fuses are good. The electrical gauges work fine (battery, temperature, fuel level). Everything esle works fine... except the dash lights.

I'm ata loss. Anybody have any good ideas? Thanks in advance.

This is on my '67, BTW.