The headlight bulb filaments are fused individually using fuse positions 4 -7. Fuses 4 & 5 are fed by a single blue/red wire to feed dipped headlamps from dip/main stalk. Fuses 6 & 7 main beam from single blue/white wire fed similarly. Check no extra wires have been added by way of a PO bodge. Ditto the solid blue wire, one of three from the light toggle switch feeding to dip select stalk.
