For illustration, As per the ‘77 schematic below, wires coming from the headlight switch: (56a and 56b)
Yellow is to the top fuse 6 for both low beams. Fuses 5&6 feed left and right low beams
White is to the top fuse 7 for both high beams. Fuses 7&8 feed left and right high beams
This configuration to feed left and right hi beams or low beams did not change from ‘64 to ‘89, and likely beyond.
The terminal designation may have moved for some year though.
Count from the headlight back.
I’m hoping this makes it clear not to mix up the yellow and white wires.
Notice the black line between the fuses on the top of S5 to S6? That is representative of the internal jumper.
