The indication functions of electric vehicle meters are as follows: power indication, battery voltage, driving speed, light indication and accumulated mileage. In addition, the multi-function instrument will have detailed instructions such as undervoltage, overcurrent and temperature. Electric vehicle instrument is a data source and a guide for cyclists.

1, the integration of pointer instrument is relatively low, the wiring of the circuit is relatively simple, and the instrument circuit does not depend on the controller circuit. The faults of mechanical instruments mainly focus on the disassembly and assembly of wires or instrument heads, and the positive and negative poles of power supply should not be connected wrong.

2. LCD instruments are good at digital and accurate display of various data, such as vehicle speed, battery voltage and mileage. If it involves the software of display driver and the model of single chip microcomputer, once the instrument fails, only the instrument components can be replaced.