What to Do When the Left Turn Signal of a Car Suddenly Flashes Very Fast?

[ZaneFitz]

You need to check whether the flasher relay is functioning properly. Use a multimeter to directly measure the output line of the flasher relay to see if there is a 12v output. Here is some relevant information: 1. Car Turn Signal: The turn signal is an important indicator light that is turned on when a motor vehicle is turning to alert vehicles and pedestrians in front, behind, and to the sides. 2. Cause: Poor contact of the bulb. If you have the ability to do so, you can check the bulb and its socket yourself to see if there is poor contact. Once poor contact occurs, it will naturally cause the flashing to be too fast, and you need to reinstall it firmly.