fuses are good or not good. blown or good. i'd check the wires where they connect to the fuse. they pretty much slip in and out.
I'd believe in intermittent fuses if they were made in China.
Several years ago on my truck, I had a combo running/brake light bulb finally burn out.
Mind you this bulb had lasted 10 years
of normal use (same as headlight bulbs).
They were quality made in Japan bulbs.
I bought a package of two replacement bulbs and replaced the bad one.
That bulb only lasted 3 days before it blew, and it's twin was so poorly made, it wouldn't even fit the socket.
Granted it was only 86 cents, but that was 86 cents wasted.
So I bought a package of quality made in Taiwan bulbs and have been fine since.
I loathe buying anything made in China.