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Farmall & IHC Tractors Discussion Board |
Re: Distributor Voltage
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Posted by Andy Martin on June 08, 2002 at 21:46:30 from (12.74.161.177):
In Reply to: Distributor Voltage posted by Bob-Wyo on June 08, 2002 at 21:13:51:
All American point ignition systems I know of run 6v at the coil. At the distributor, the circuit is just grounded through the points so the voltage there is just measuring point resistance. On 12v systems you need a resistor or resistor wire. The resistor is internal to many 12v coils but not all, even though they are marked 12v. GM used resistor wire in the ignition circuit for many years so it is safe to buy a GM coil and put on an external resistor. If you are buying a new coil the seller should know whether it has an internal resistor.
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