1940 dome light fuse

[tturley]

I have seen posts that recommend that you add a fuse to the dome light and I would like to do so.
Problem is I can't find on the wiring diagrams where it feeds from. I have both shop manual and authenticity but can find on either

[Steve Passmore]

Traditionally it's power is supplied from the light switch with its feed traveling up one or the other of the front door pillars. I would guess from a terminal that's permanently live.