How to check for faults in the starter motor

To check for faults in the starter motor, the following steps can be taken:
Observing the performance of the starter: If the starter cannot function properly, such as the drive gear not rotating, insufficient power, or abnormal noise, this may be a precursor to the starter's malfunction.
Use the "short circuit" method to check the starter: directly supply power to the starter through the "short circuit" method, and then check if it can operate normally. If it can operate normally, it indicates that the starter itself is not faulty; On the contrary, there is a problem of malfunction or damage.
Check the starter relay contacts and magnetic coils: Sometimes, a starter motor malfunction may be caused by a short circuit or damage to the starter relay contacts or magnetic coils. At this point, the relevant components can be checked to see if replacement is necessary.
Check the coil and contact plate of the starting electromagnetic switch: The malfunction of the starter may also be caused by problems with the starting electromagnetic switch and contact plate. At this point, you can check the relevant circuits and contact points to see if there are any issues.
During the inspection process, it is also necessary to pay attention to the following matters:
Before conducting a start check in the car, be sure to shift the transmission to neutral and apply the parking brake.
Before disassembling the starter, the grounding cable of the battery should be removed first.
All parts should be disassembled or disassembled after the starter has cooled down to avoid burns.
Please note that the above are only basic inspection steps and precautions. If the cause of the malfunction cannot be determined or the problem cannot be resolved, it is recommended to seek the help of professional technicians to ensure safety and accurate diagnosis of the malfunction.