Posts Tagged: car USB data connection issues

Why Your Car’s USB Suddenly Stops Working

What Is a Polyfuse? The Hidden Reason Car USB Ports Fail When you’re diagnosing a charging complaint or a USB port not working in a car, one component most technicians never think about is the polyfuse. But understanding it can save you from misdiagnosing a perfectly good USB module. What Is a Polyfuse? A polyfuse — technically called a PTC resettable fuse (Positive Temperature Coefficient device) — is a self-resetting overcurrent protection device. Unlike a traditional blade fuse that melts and must be replaced, a polyfuse automatically “trips” when current … Read More