Posted by Tom Petroff (IL) [108.162.216.37] on Friday, January 08, 2021 at 20:23:01 :
In Reply to: Fuel Gauge Info (1946 Power Wagon) posted by Farmer [108.162.245.119] on Friday, January 08, 2021 at 20:07:49 :
Can't use original dash gauge with aftermarket sender.
One it is 6V, you can add a resistor if using
A stock sender.
More importantly the early trucks used a two wire system which heats a bi-metal strip in the Gauge that heats a coil to move the needle.
Current flows from the sending unit to the gauge and back to the sending unit.
This is a King-Seeley/Auto-Lite system
You will need to re-use the original sending unit with added resistor or replace the gauge.
Diagram top left.
Tom
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