Well, I wouldn't say that diagram says the ignition get's it's power FROM the light switch, but it says power connects there first... if your lights come on, that's not the issue.

apparently the light is the first stop on the path to the ignition switch. but a totally blown out light switch would have no affect on the ignition, unless there was a fire or something... it's just a junction point.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!