Section 03-06: Starting System
1993 Mustang Workshop Manual
DESCRIPTION AND OPERATION

Sequence of Operation

  1. The ignition switch is turned to the START position.
  1. A fender mounted starter relay is energized, which provides voltage to the starter solenoid. The starter solenoid is energized, creating a magnetic field in the solenoid coil.
  1. The iron plunger core is drawn into the solenoid coil.
  1. A lever connected to the drive assembly engages the drive pinion gear to the flywheel ring gear.
  1. When the iron plunger core is all the way into the coil, its contact disc closes the circuit between the battery and the motor terminals.
  1. The current flows to the motor, and the drive pinion gear cranks the flywheel and the engine crankshaft.
  1. As current flows to the motor, the solenoid pull-in coil is bypassed.
  1. The hold-in coil keeps the drive pinion gear engaged with the flywheel.
  1. The gear remains engaged until the ignition switch is released from the START position.



    An overrunning clutch in the drive assembly protects the starter from excessive speeds during the brief period before the driver releases the ignition switch from the START position (as the engine starts).