Start by checking the
Battery Cables and connections, testing the battery's condition, and examining the starter motor wiring. Check the related fuses and inspect the ignition switch circuit. Verify the operation of the clutch pedal position switch or the TR sensor. If the starter does not activate, check for battery voltage at the starter solenoid. If voltage is present, remove and bench test the starter motor assembly. If the pinion drive extends but does not rotate, the solenoid is operational but the starter motor is defective. If the solenoid plunger extends and rotates the pinion drive, the starter assembly is functioning correctly.