A/T Model
Power is supplied at all times to ignition switch terminal No. 1 through 40-Amp fusible link (letter "E", located in the fuse and fusible link box).
With the ignition switch in the ON or START position, power is supplied through 10-Amp fuse [No. 18, located in the fuse block (J/B)] to park/neutral position relay terminal No. 1.
Also, with the ignition switch in the START position, power is supplied from the ignition switch terminal No. 5 to park/neutral position relay terminal No. 6.
With the selector lever in the "P" or "N" position, ground is supplied to park/neutral position relay terminal No. 2 through the park/neutral position switch.
Then the park/neutral position relay is energized and power is supplied from park/neutral position relay terminal No. 7 to terminal No. 2 of the starter motor windings.
The starter motor plunger closes and provides a closed circuit between the battery and the starter motor. The starter motor is grounded to the cylinder block. With power and ground supplied, cranking occurs and the engine starts.