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Farmall & IHC Tractors Discussion Board |
Re: Electrical question
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Posted by Joe Kimbriel on July 25, 2006 at 10:49:25 from (66.37.169.172):
In Reply to: Re: Electrical question posted by RustyFarmall on July 25, 2006 at 10:29:07:
Cowman is correct. Coils do not have voltage they have internal resistance. If a coil has enough internal resistance to handle 12 volts with out getting hot then it can be considered a 12 volt coil. If the coil gets hot with 12 volts then a dropping or ballast resistor must be added. With the resistor added externally, normally the voltage at the coil will be somewhere around 6-7 volts. With the resistor added externally also allows for the starter relay to give full 12 volts to the coil when starting for a hotter spark. Does this make any since, hope so? The answer, will the JD coil work? Maybe, with a good understanding of you electrical system resistor or no resistor internal or external.
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