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Premium Member
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Hello Junkman, welcome to the forum.

You may have a short somewhere in your electrical system that is draining your battery. Common problem with these old Ford diesels. 12.4 V is not enough voltage from your alternator, but it might be pulled down by a discharged battery?? Should be 13.5 - 14V. I would charge the battery up and then check the voltage. If the voltage remains at 12.4, your alternator is not putting out.

Disconnect your battery next time you finish with the tractor, and see how it cranks next time you want to use it.

If you have a short in your electrical system, it is imperative that you find it and fix it. Disconnect the battery whenever you are not using the tractor. Below is a picture of my Ford 3600 about 30 years ago, because of a short circuit.


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