(1) The battery is insufficient or the wires are loosely connected, and the terminals are dirty, resulting in poor contact.
(2) The coil of the starting solenoid switch is open or the contact plate is in poor contact.
(3) The contact of the starting relay is ablated, and the magnetic coil of the relay is open or burned out.
(4) The internal armature shaft of the starter is bent or the bearing is too tight, the rectifier is dirty or ablated, the brush is too short, the spring is too soft to contact, the armature coil or the field coil is short-circuited, open or grounded.
(5) The starting anti-theft system fails.
(6) As we all know, the starting of the engine needs the support of external force, and the car starter is playing this role. Generally speaking, the starter uses three components to realize the entire starting process. The DC motor introduces the current from the battery and causes the drive gear of the starter to produce mechanical movement; the transmission mechanism meshes the drive gear into the flywheel ring gear, and at the same time it can automatically disconnect after the engine is started; the starter circuit is turned on and off by an electromagnetic switch To control. (7) The motor is the main component inside the starter.