Does a car USB port have a fuse?
Check the Fuse Box
A blown fuse can shut down the circuit that feeds electricity to the USB port. Find the fuse panel (typically on the driver’s side of the car) and the diagram that identifies what each fuse does.
Why would USB stop working in car?
Because your car’s USB port is open, food, dust, and other debris can make their way into the port, blocking the connection. If you suspect the port is dirty, try: Inspecting the USB port for particles. Removing any particles that have made their way in using a toothpick.
What would cause USB ports to stop working?
USB-related issues can be caused due to incompatible device, outdated, incorrect, or corrupt drivers, damaged USB ports or cables, faulty USB port, and so on.