Ignitionswitch voltages question (1969)

Guys, car functions fine, runs and starts good. Except for a small problem when running on LPG. I won’t bother you with that.

But because of that problem, I measured power at the ignitionswitch. And I wonder if the voltages it shows are normal.
The red wire shows a nice 12,36volts. With the key in “RUN” the blue wire shows 11,35volts, but the brown (start) wire also shows 5,35volts when in “RUN”. Is that normal, should the brown wire not show 0 volts when key is in “RUN”?

With the key in...

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Author: Stargazer