Blown stop lights/hazard flasher fuse

It's my '71 Demon. Yes, I have the factory manual and all wiring diagrams.
The dashboard wiring has been replaced last year.

I will check the stop lights wiring and sockets.

Speaking about the cigarette lighter is a good idea : I use it as an USB charging plug for my phone and my Bose wireless speaker. I didn't noticed if the USB worked after that the fuse did blow.
Maybe that the problem comes from the USB plug... too much amperage asked.
I will try to replace the fuse (not done yet as I don't have glass fuses anymore) and avoid using the USB plug
Thank you :thumbsup: