The pre-engineer starter has a solenoid that engages the pinion gear with the flywheel/drive plate ring gear when the engine is started.
When working on the electrical system, the following precautions must be observed to prevent damage to semiconductor devices and personal injury.
Precautionary measures
Always remove rings, watches, and other metal objects when working on an electrical system.
Do not mix up the battery wires.
Warning! Do not disconnect the battery, alternator, connecting wires or devices while the engine is running.
Do not check the operation of the generator by touching the output wire to the ground of the vehicle.
Always disconnect the negative battery cable before working on the electrical system.
Before using electric welding equipment, disconnect the battery, alternator and all electronic control units.
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