Possible reasons for the car usb power failure are:
1. The USB port is broken.
2, the vehicle USB interface fuse is burned out.
3, the charging cable has a problem, the mobile phone interface has a problem. You can check which is the problem one by one, usually there are more reasons for the line. You can also go to the repair shop to check the specific reasons.
< br >
Car usb plug out of power solution:
1. When charging, the voltage is unstable, resulting in no charging. When the power is turned on, the mobile phone or other smart electronic products will generally open the power monitoring and detection program. If the program detects that the vehicle flush voltage is unstable, it prohibits the flush. When using the seat, there will be no program for detection, it is recommended to use the usb interface of the car audio computer system to charge, whether it is a line or a seat.
2, check whether the car charger parameters meet the charging requirements to check the car charger output voltage, current, whether to support their own digital products. Some parameters do not meet, such as the output current for 1A car to charge the tablet computer, it is not rushed into the electricity. This is caused by insufficient current, and a high-power car charger needs to be replaced.
The reason may be the battery leakage, the connection of the charging circuit is not reliable, or the charger damage and other problems, the following is the introduction of the related faults: 1, the battery leakage fault phenomenon: the common leakage phenomenon, the upper cover and the bottom groove between the seal is not good or due to collision, sealant cracking caused by leakage. Acid leakage of the cap valve, acid leakage at the wiring end, and acid leakage in other parts.
< br >
2, the battery is not charged into the fault phenomenon: whether the connection of the charging circuit is reliable, whether the connection and the plug contact is intact, whether the socket and plug have a \"spark\" burning arc phenomenon, whether there is line damage and broken line