Possible causes for non-functioning turn signals include a burnt-out turn signal relay or a blown turn signal fuse, which are two major factors. While the turn signal relay can be replaced by oneself, fuse replacement should be handled by professionals to avoid causing more severe vehicle malfunctions. Below are relevant details: 1. Definition of Turn Signals: Turn signals are crucial indicator lights activated when a motor vehicle changes direction to alert surrounding vehicles and pedestrians. These lights use xenon tubes with microcontroller-controlled circuits for alternating left/right flashing. They employ flasher units to achieve blinking, mainly categorized into thermal (bimetallic), capacitor, and electronic types. 2. Function of Turn Signals: As the primary device displaying a vehicle's dynamic information, turn signals mounted on both ends of the vehicle body ensure driving safety during turns. Proper usage allows others to anticipate vehicle movements and make correct decisions. 3. Usage Guidelines: (1) When entering or exiting roundabouts, activate corresponding turn signals based on travel direction. (2) During lane changes due to traffic congestion, check adjacent lane availability via mirrors without obstructing other vehicles, then activate appropriate signals before changing lanes. (3) When making U-turns, engage left turn signals while checking for approaching vehicles before executing the maneuver.
