It's all about the details.
Ve absolutely forbid zees fuzes to blow! Zey vill carry ze current und zey vill enjoy it!
Thanks for the response and links. I had a short in the headlamp circuit caused by a self-inflected rookie mistake - a lamp wire got pinched when I reinstalled the tachometer into the instrument housing. Fusing the headlamp and ignition switch is a worthwhile project.