Why does the turn signal stay on without blinking?
2 Answers
If the car's turn signal stays on without blinking, it may be due to a problem with the relay or wiring connection. You can try replacing the relay's fuse or checking the wiring connections. Below is an introduction to car turn signals: Function of turn signals: The turn signal is a very important set of lights in a car. It alerts surrounding vehicles and pedestrians, thereby improving driving safety. Turn signals use flashing lights, which blink when activated, controlled by a microcontroller circuit. Principle of turn signals: They operate based on the thermal effect of electric current, using thermal expansion and contraction as the driving force to make the spring plate produce sudden movements, thereby connecting and disconnecting the contacts to achieve light blinking. The resistance wire type can be further divided into thermal wire type (electrothermal) and wing type (bounce type), while the electronic type can be divided into hybrid type (relay with contacts and electronic components) and fully electronic type (without relay). For example, the bounce-type flasher,
In the old cars I've driven, I encountered a situation where the turn signal stayed on without flashing. The main reason was the aging or failure of the flasher relay, which controls the blinking. Over time, the internal contacts can become burnt and stop working. A burnt-out filament bulb is also a possibility, but relay issues are more common. Once, my car sat unused for a long time, and the relay malfunctioned due to moisture. A simple replacement fixed the issue. If not repaired promptly, other drivers may misjudge your turning direction, which is especially dangerous at intersections and can lead to accidents. Regular electrical system checks can prevent such faults. Relays aren't expensive, and replacing them yourself is convenient, but make sure to get the correct model and avoid buying the wrong one.
