headlight switch wiring

[Anonymous]

ok, looking at the schematic on the tech side, but kinda lost. plus my GM color coded harness has a few diff colors than what my switch has. any help GREATLY appreciated.
heres how my switch is wired.

white
red green black
yellow unsure(think it was brown)
orange

if i am right....
white is courtesy power
red main power
green inst power ? but then what is the grey inst power wiring?
yellow ???
orange ???
black ground


thanks
rob