Why does turn signal bulb go on and off?

A turn signal bulb may go on and off due to a faulty connection, such as a loose wire or corroded socket, which disrupts the electrical flow. Additionally, a burned-out bulb can cause the turn signal to flash rapidly or intermittently. In some vehicles, a malfunctioning relay or flasher unit can also lead to erratic blinking. Regular maintenance and timely bulb replacement can help prevent these issues.