light switch box

nak 1952 · Oct 30, 2009

Does anyone know what size fuse goes in the switch box on a farmall m? Also did all m's with a three position switch have fuses sticking out of the box cover?

Bob · Oct 30, 2009

20 Amp.

rustyfarmall · Oct 30, 2009

Guess I can't say for sure, but I've seen the the ammeter box with the fuse sticking out ONLY on the Supers. Maybe I am just not too observant?

Bob M · Oct 30, 2009

I believe all Farmalls with a 3-position light switch (this includes all Supers plus late production non-Supers) have the fuse holder mounted through the cover.

The correct fuse is an SFE-20 glass cartridge.

rustyfarmall · Oct 30, 2009

I've got a 1950 H with the 3 position switch and it does not have the fuse. The tractor appears to be all original. Nothing to indicate that the switch or amp box has ever been changed.

nak 1952 · Oct 30, 2009

Thanks for the info guys!

light switch box

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