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1. Check the power supply and connection: ensure that the power cord of the car charger is properly connected to the power socket of the vehicle, and the plug is tightly connected to the charger.
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2. Check the charging cable: Check whether the charging cable has obvious damage or cracks. If yes, replace the charging cable with a new one.
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3. Clean the connector: Gently clean the connector of the charger using a cotton swab or dry soft cloth to ensure that no dust or dirt affects the connection effect.
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4. Restart the charger: If the car charger fails or does not work properly, you can try to disconnect it from the power supply and reconnect it. This can sometimes solve temporary problems.
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5. Check the vehicle power supply: Ensure that the vehicle power socket is working properly and can be tested by plugging in other electronic devices.
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6. Contact the supplier or manufacturer: If the fault persists, contact Huawei customer service or authorized maintenance center for professional maintenance.
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Please note that before performing any repair operations, ensure that the charger has no current and strictly follow the operating instructions in the user manual to avoid any accidental injury.