Why does the car turn signal intermittently fail?

[SanAdeline]

Intermittent failure of the car turn signal is usually caused by a faulty flasher relay or turn signal switch. Below are the specific causes and solutions: Flasher relay failure: If the flasher fails, it will cause both the left and right turn signals of the vehicle to not work. Solution: In this case, the general solution is to replace the flasher. Turn signal switch failure: If the turn signal switch of the vehicle fails, it will cause either the left or right turn signal to not work. Solution: For this situation, it is generally recommended to go to a repair shop for maintenance and replace the faulty turn signal switch.