Starting System Circuit Description P32

Battery voltage is applied at all times to the starter solenoid B terminal through the BLK (1) wire. Voltage is applied at all times from the starter solenoid B terminal to a fusible link. Voltage is then applied to the battery junction block through the fusible link and the RED (2) wire. The battery junction block applies voltage at all times to the starter relay through a fusible link and a RED (2) wire. The battery junction block also applies voltage at all times to the ignition switch through another fusible link and a RED (2) wire.

When the ignition switch is turned to the START position, voltage is applied from the closed contacts of the ignition switch to the CRANK fuse through the YEL (5) wire.

From the CRANK fuse voltage is then applied to the park/neutral position (PNP) and backup lamps switch through the DK BLU/WHT (805) wire. When the PNP and backup lamps switch is in the PARK or NEUTRAL position, voltage then goes to the coil of the starter relay through the PPL (806) wire.

Because the other side of the starter relay coil is permanently grounded, the relay energizes. Voltage is then applied from the now closed contacts of the starter relay through the RED (2) wire to the S terminal of the starter solenoid through the PPL (6) wire.

With voltage applied to the starter solenoid S terminal, current flows through the hold-in coil to the mechanical ground at the solenoid. At the same time, current flows through the pull-in coil and the starter motor's mechanical ground. The combined magnetic force of the coil windings overcomes the force of the return spring to pull in and hold in the plunger. The plunger moves the shift lever. This causes the drive assembly to engage with the engine flywheel.

The plunger actuation also operates a contact within the starter solenoid which closes to apply battery voltage directly to the starter motor. The starter motor now cranks the engine.

With battery voltage applied directly to the starter motor, the pull-in coil now has voltage applied to both ends of the coil and current ceases to flow. The starter solenoid remains engaged due to the current flow through the hold-in coil alone. The starter motor continues to operate until the ignition switch is returned to the RUN position.

With the ignition switch in the RUN position, voltage is removed from the starter solenoid S terminal. Voltage is applied at the B terminal, so both coils are still energized by battery voltage through the closed motor contacts. However, the forces from these coil windings now oppose one another and the plunger returns to the disengaged position through the operation of the return spring. This opens the contact within the solenoid to remove battery voltage from the starter motor and the motor stops. Both coils also de-energize. This plunger operation also retracts the starter drive assembly from the flywheel and the engine operates under its own power.

Starting System Circuit Description P42

Battery voltage is applied at all times to the starter solenoid B terminal through the BLK (1) wire. Voltage is applied at all times from the starter solenoid B terminal to a fusible link. Voltage is then applied to the battery junction block through the fusible link and the RED (2) wire. The battery junction block applies voltage at all times to the starter relay through a fusible link and a RED (2) wire. This same fusible link applies voltage at all times to the ignition switch through a RED (2) wire.

When the ignition switch is turned to the START position, voltage is applied from the closed contacts of the ignition switch to the CRANK fuse through the YEL (5) wire. Voltage is then applied to the park/neutral position (PNP) and backup lamps switch (automatic), or to the clutch pedal position (CPP) switch (manual) through the DK BLU/WHT (805) wire.

When the PNP and backup lamps switch is in PARK or NEUTRAL, or the CPP switch is closed, voltage is then applied to the coil of the starter relay through the PPL (806) wire. Because the relay coil is permanently grounded, the relay energizes. Voltage is then applied from the now closed contacts of the starter relay through the RED (2) wire to the S terminal of the starter solenoid through the PPL (6) wire.

With voltage applied to the starter solenoid S terminal, current flows through the hold-in coil to the mechanical ground at the solenoid. At the same time, current flows through the pull-in coil and the starter motor to the starter motor's mechanical ground. The combined magnetic force of the coil windings overcomes the force of the return spring to pull in and hold in the plunger.The plunger moves the shift lever. This causes the drive assembly to engage with the engine flywheel.

The plunger actuation also operates a contact within the starter solenoid which closes to apply battery voltage directly to the starter motor. The starter motor now cranks the engine.

With battery voltage applied directly to the starter motor, the pull-in coil now has voltage applied to both ends of the coil and current ceases to flow. The starter solenoid remains engaged due to the current flow through the hold-in coil alone. The starter motor continues to operate until the ignition switch is returned to the RUN position.

With the ignition switch in the RUN position, voltage is removed from the starter solenoid S terminal. Voltage is applied at the solenoid B terminal, so both coils are still energized by battery voltage through the closed motor contacts. However, the forces from these coil windings now oppose one another and the plunger returns to the disengaged position through the operation of the return spring. This opens the contact within the solenoid to remove battery voltage from the starter motor and the motor stops. Both coils also de-energize. This plunger operation also retracts the starter drive assembly from the flywheel and the engine operates on its own power.