Here is a wiring diagram from the 1930s. Car and 1/2 ton truck were nearly identical. 15A fuse goes in the holder. There is no resistor for dimming the instrument light(s).

HTH
Attachments
1930s Wiring Diagram.jpg (258.77 KB, 100 downloads)
Wiring Diagram


Gord 🇨🇦
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1954 1/2 ton 235 4 speed