What causes the turn signal to stay on constantly in the Passat Lingyu?

[VanElliott]

Passat Lingyu's turn signal staying on constantly may be caused by a relay failure or a loose connection in the circuit. Below is more information about turn signals: 1. Introduction: Turn signals are important indicator lights that activate when a motor vehicle turns to alert surrounding vehicles and pedestrians. The turn signal bulb uses a xenon tube, controlled by a single-chip microcomputer circuit, working continuously with alternating left-right flashes. Turn signals utilize a flasher to achieve light blinking, which can mainly be divided into three types: resistance wire type, capacitor type, and electronic type. 2. Structural Principle: The resistance wire type turn signal operates on the principle of thermal effect of current, causing the spring plate to make sudden movements to connect and disconnect contacts, thereby achieving light blinking.