Occasionally, the starter will have faults and phenomena that cannot be rotated or turned slowly. In this case, the following aspects should be checked:

1. The battery has no power or weak power, so there is a fault that the starter cannot rotate or rotate slowly.

2. The starter wire is loose or loose, and the switch or adsorption switch is invalid.

3. The brush is worn or the brush surface is not correct, and the spring is weak, so that the rectifier is in poor contact.

4. Short circuit and open circuit of the excitation coil or armature coil.

5, the rectifier is fouled, and the mica plate protrudes, causing poor contact between the brush and the rectifier.