Farmall 504 key switch

LMP1953 · Oct 14, 2015

The wires on my key switch on my Farmall 504 are fried. The switch leads are okay but the internal wires under dash are just about bare. Can I by pass all the old wires?

Steve@Advance · Oct 14, 2015

Are you saying the wires are fried, as in overheated? Or the insulation is falling off from old age or rodent damage? Big difference!

If the wires have overheated at the switch, or any where, that is a sign of a bad connection, a short, or overloaded circuit. The switch is likely bad and will need to be replaced and the damaged wire replaced.

If the entire harness is failing, a new harness can be bought or a new one made.

Be careful bypassing anything! Every wire has a purpose, making changes will create a problem somewhere, end up with mystery battery drain, safety issues, even electrical fire!

Farmall 504 key switch

LMP1953

New User

Steve@Advance

Well-known Member

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