What are the main reasons for weak operation of a car starter?

[LeAlina]

The main reasons for weak operation of a car starter are: 1. Power wire failure; 2. Battery depletion; 3. Short circuit or open circuit in the electromagnetic switch holding coil; 4. Poor contact of the starter switch contacts; 5. Excessive wear of the starter brushes or weak brush springs. The troubleshooting methods for weak starter operation are: 1. Check the battery capacity and the connection of power wires; 2. If the battery capacity is sufficient and the wiring connections are good, use a metal strip to bridge the two main terminals of the starter electromagnetic switch. If the starter operates strongly after bridging, it indicates poor contact between the main contacts and the contact disc inside the starter electromagnetic switch. If the starter still operates weakly after bridging, it suggests a fault in the motor or poor grounding, requiring further disassembly and inspection.