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The 2019 Ford Explorer's USB port might stop working due to various factors, such as a blown fuse. All the electrical components in the car are connected to a fuse, which serves to protect them from power surges and similar incidents. If such an event occurs, the fuse essentially sacrifices itself to safeguard the electronic device. A potential solution could involve locating and replacing the fuse specific to the USB port. Another potential cause could be the port short-circuiting, possibly due to forcing a USB cable in the wrong way. In such cases, the port may shut down and require a power cycle of the car to reset it. This involves turning the car off, waiting a few minutes, and then turning it back on. It's also important to check for any broken wires or disconnections as possible sources of the issue.
One frequent reason for a USB port not functioning in a 2019 Ford Explorer is due to dirty connections. Use a cotton swab to clean the contacts.