[OG68]

There are two wires from the ignition switch Accessory terminal.
The brown wire feeds the Acc fuses.
Brown with white tracer goes to terminal H of the interior side fuse block. A second brown wire goes from terminal H to the gauge panel for the Gen indicator light.
My guess is that the brown/white wire is resistive to provide a dim indicator.

The Gen light goes bright when powered by the voltage regulator contacts through terminal H of the fuse block