What Causes the Car Starter to Not Respond When Igniting?

[OSophia]

Possible reasons for this issue include: 1. Power supply and transmission failure, or starter relay malfunction. During inspection, the first step is always to check the battery condition. You can turn on the headlights to observe their brightness. If the lights appear dim, it may indicate excessive battery discharge, loose connections, or poor contact. 2. If the battery is in good condition, check for relay faults: examine whether the relay coil has burnt windings or open circuits. Check if the relay contacts are severely burnt or fail to close. If none of these issues exist, proceed to inspect the starter motor. 3. Check whether the electromagnetic switch contact disc can properly connect both contacts, including verifying if the contact heights are uniform and inspecting for any burning. Examine whether the commutator is burnt, affecting poor contact with the brushes. Check if the brushes are grounded or have open circuits with the field windings. Inspect whether the field windings and armature windings themselves have open circuits, short circuits, or grounding issues. Finally, check if the armature shaft is bent or "eccentric."