. The resistance wire must be energized when you come off of the start position on the ignition switch. Turn the switch to the on position and test voltage of the resistance wire at the coil.
While the ignition switch is in the start position, a separate wire is energized, providing full battery voltage to the coil.
If your resistance wire is bad, the engine will fire while the ignition switch is in the start position. Once the ignition switch is allowed to fall back to the run position, the engine will die.
