First the disclaimer: I don't have specific information regarding this
Are you sure there is anything else on that fuse? Every vehicle that I
have ever worked on with fused headlights has two things in common:
1. There will be separate fuses for each side, so that if one fuse
blows, you don't loose both lights, and
2. There is nothing else on the fuse that might cause it to blow, as the
circuit is critical enough that you don't want other non-essential items
causing a blown fuse.
Interesting, and in a way that could be sensible! I'd want to do some
more testing before I was 100% sure that is how it is wired, but it may
well be that way. (Being an EE, I can tell you that such a wiring setup
would be inefficient both requiring more wires, and a more complex switch.)
But, if it is wired that way, the logical place for the fault would be
where the splice(s) are, or the headlight switch. You can test the
headlight switch easily enough, and with a helper test the wires too.
You probably will not find a direct connection between the two lights
however, it is likely they are wired through the headlight switch. If I
had access to a manual I could probably give you better advice, but my
C-900 manual won't relate to your car unfortunately. (sorry.)
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