Here is a way to check by yourself if the light system is not working
![electric passenger tricycle taillight electric passenger tricycle taillight](https://prof562e926-pic5.ysjianzhan.cn/upload/lightsystem.png)
Step 1: unit is working if use remote key, but it is not working if use ignition keys , then so change ignition.
Step 2: converter is broken or socket is loose. Please request home service or go to the nearby branches.