Its fitted as on Nobbylad's schematics (apart from the stock horn) with a 15A fuse and the relay that came with the Stebel, what wondered me was why does the stebel work fine on its own (with my last fuse
) and blows the fuse with the standard one.
Is it possible that the Nautilus uses just under 15A and together the horns use more then 15A?