What Causes the Turn Signal to Light Up Without Sound?

1 Answers
VanNevaeh
07/29/25 5:05pm
Turn signals that light up without sound may be caused by a malfunctioning flasher relay or buzzer. Below is an introduction to turn signals: 1. Overview: Turn signals are essential indicators activated when a motor vehicle turns to alert surrounding vehicles and pedestrians. The turn signal bulb uses a xenon tube, controlled by a microcontroller circuit, with alternating left-right flashing for continuous operation. Turn signals employ a flasher to achieve blinking. They can be mainly categorized into resistance-wire type, capacitor type, and electronic type. 2. Structural Principle: The resistance-wire type can be further divided into thermal-wire (electrothermal) and vane (spring-loaded) types, while the electronic type includes hybrid (relay with contacts and electronic components) and fully electronic (relay-free) types. For example, a spring-loaded flasher operates on the thermal effect of current, using expansion and contraction to drive sudden spring movement, opening and closing contacts to achieve blinking.
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