Which fuse powers the sun visor mirror lights

What type of automobile are you working on??

I'm not sure you can. Talk to a Subaru parts guy at a dealership. What I can tell you for sure is this: I replaced the passenger side visor on a '94 Legacy Lsi that was torn off when the car was stolen and driven from WV to FL. I couldn't find a used one and the insurance company wound up paying 135 bux for an original equipment replacement. Good luck. . .

should be same fuse for the interior light if the interior lights come on its most likely a burned out bulb

Did this visor have a lighted vanity mirror in it? Did you check the BCM fuses and window fuses, some are under the hood.

The junk yard for recently wrecked and totalled cars.

ok.. you either bought the lights over the vanity mirrors in the sun visors... or the lights are not working in the sun visors???? Wow man!... think you could take additional classes in the English language? ... what's this issue with 'extra clock' in between the sun visors are not working'???? Tell you what, since you're convinced you have a problem, Go to www.hmaservice.com and register( Vehicle by VIN). Afterward, you have access to shop manuals, service bulletins, wiring diagrams, etc. about your vehicle.

The "post" mounted into the roof/headliner has a plastic "cap" cover over the screws, I believe. If not simply remove the screws and drop the visor down...it may have a wire that connects power for the vanity mirror...just find the tiny clips and disconnect. I'd look for the visor using a junkyard "landline" search-first. Trim pieces like visors can be difficult to locate depending where you live in the country. Dealer-sourced, expect to spend $$$ per visor
Good Luck

Sun visor lights,... remove the sun visor clips you will find a copper insert inside the clip if this has broken (they do) you will need to replace them they 're about $12-15 ea. put them in & open your mirror "Gorgeous"
For the horn check the wire leads on the horn they are probably loose

Did the sun visor have a light up make-up mirror? If it did I'm guessing that the wire or wires that went to it are now shorted out, either to each other or the metal car body. Try to get at this wire or wires and apply electrical tape as insulation. You can probably check in your owner’s manual to see it the make-up mirror shares a fuse with the radio windows and gas gauge. Re-check that fuse to make sure it's not blown. Also check to see if there is a fusible link that may be blown. Maybe the short in the make-up mirror is not pulling enough current to blow the fuse but enough to drop the voltage and mess up the function of the radio, windows, and gas gauge.

never seen one before... but my best guess would be to keep the sun out. when you put down your visor it doesn't always stop sun from being in your eyes