When the starting switch is turned on, when the starter does not turn, the horn can be trumpet or the headlight is opened. If the horn does not sound and the light is not bright, the power supply is malfunction, and the battery and connection string should be checked. If the loudspeaker sound is normal and the lamp is bright, it indicates that the power supply is good. At this point, you can turn on the headlights and start the engine. If the light is darker and darker, it will be normal. If the brightness of the lamp does not decrease, it means that the starter does not have a strong current. In this case, it is necessary to check whether the starter circuit has a circuit breaker and whether the joint is loose or not. If the two items are in good condition and the starter does not turn, the starting switch should be checked. If the starting switch is good, the fault is in the starter itself.