Re: Farmall Electrical System

Posted by John T on December 25, 2006 at 16:48:11 from (66.244.90.5):

In Reply to: Farmall Electrical System posted by David Goode on December 25, 2006 at 13:56:06:

I will cast my vote same as the gents below, since it happened after a rewiring sounds like the ignition switch is bad or more likely wired wrong,,,,,,,, or in the event it has a GM 10 SI 3 Wire alternator, perhaps you miswired a diode or an in line series resistor in its excitation circuit, cuz without one or the other and if its wired like many 3 wire alternators the coil is being backfed voltage from the alternators lil side 1R terminal excitation circuit, so she runs even with the ignition switched off. If so add a series 10 ohm current limiting safety resistor right before where it wires to the lil terminal 1R on the alternator and that should let it die when you turn off the ignition switch. If its NOT an alternator problem, get a test lamp n attach it to the IGN output terminal on the ignition switch (that wires to the coil) n see if goes on n off with the ignition switch as it should.

John T

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