If the converter does not work, please check this following steps:
1. Please to check whether the power supply has voltage
2. Whether the terminals are in poor contact and whether the wire ends are connected securely
3. Please to check whether the wires are installed as shown in the pictures and instructions. If the wires are not installed correctly, the voltage regulator will not work
If all the above are correct, please reach out us and we will solve your problem immediately.