Posted by Janicholson on January 16, 2014 at 17:19:46 from (74.60.94.18):
In Reply to: Ford 9N posted by Harold C on January 16, 2014 at 17:02:27:
an ignition resistor is used to lower the voltage supplied to the coil while running. This allows a coil with a lower voltage design to be used for running, while a separate wire is used to supply full voltage during cranking with the starter motor. The cranking motor draws enough amps to lower the battery voltage to 4.5 or so. the bypass thus allows hot spark for starting at that lowered bat voltage. If the wire is bad, a 1.5 ohm 40 watt power resistor could be used instead with plain 12ga copper wire to the switch. Ford used a resistor wire in many vehicles including cars into the 70s. Jim
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