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the fuses should all be right there. I was into the fuse panel on my 6341 to put more lights on it, I don't think there is any other fuses. does everything else work-flashers, brake lights etc.
I would make sure the switch is okay as they fill up with dust. You can get them apart to clean them. I assume you know that the top lights only work on dip beam and the headlights go off when you turn the top ones on.