With the ignition switch in the start position, battery voltage is transferred through the ignition switch to the clutch pedal position (CPP) switch (manual transmission) or the transmission range switch or the park/neutral position (PNP) switch (automatic transmission). When the clutch pedal is depressed, the CPP switch is closed and battery voltage is applied to the starter solenoid windings. When the manual selector lever is in the park or neutral position, the transmission range switch or the PNP switch is closed and battery voltage is applied to the starter solenoid windings. In each case, this causes the shift lever to push out the drive assembly engaging it with the flywheel. This action will also cause the contacts in the starter solenoid to close, providing voltage to the starter motor.

Once the engine starts, an override mechanism (overrunning clutch) allows the drive assembly to turn at the same speed as the flywheel. Once the ignition switch is released, placing the ignition switch in the ON position, the windings in the starter solenoid are de-energized and the return spring returns the drive assembly to its original position and opens the contacts.