instrument lighting wiring and fuse

Yes. When it cools down it resets.
I've had this happen to me at least twice while driving.
Once was a '75 Valiant coming home from school at night.
The other time I recall was with my current '67 Barracuda some time after I had installed relays for the H4 Hellas.
That was a long drive back to Phila from North jersey, thinking about what the problem might be.
Turned out the problem was some of the wire insulation had chafed on the back of the headlight buckets. Not the new relay wiring, but some of the original wiring which now was used to trigger the relays. Every time it was shorted, the breaker would open. If I recall correctly the high beams rarely shorted on the trip but hte low beam wires touched alot. After looked at the lamps at a service area - it got a little better. I was pretty much home when the dim bulb in my head finally turned on and figured out what was probably going on.