Why do the two turn signals keep flashing and cannot be turned off?
2 Answers
Methods to stop the two turn signals from flashing continuously: 1. Turn off the hazard lights: Check if the hazard lights are on and simply turn them off. 2. Replace the hazard light relay: Use a multimeter to test the output line of the hazard light relay. If there is no output or a constant 12v output, it indicates that the hazard light relay is damaged. 3. Remove the fuse: Pulling out the hazard light fuse can prevent the car's hazard lights from flashing again and will not affect the normal use of the vehicle's turn signals or locking functions. However, it is necessary to visit a repair shop to inspect and fix the hazard light issue.
Seeing the turn signal flashing non-stop is really frustrating, especially when driving as it can be dangerous. I suspect the most likely cause is a faulty turn signal switch—either the button didn't pop back up after being pressed or it's stuck internally, keeping the circuit continuously engaged. Another possible reason is a malfunctioning relay that controls the flashing; if the contacts inside the relay are stuck together, the light won't turn off. Short circuits are also common, such as due to aged wiring with poor contact or moisture damage. There’s also the possibility of an issue with the vehicle’s control module—if the computer malfunctions, it might keep sending signals. Immediately pull over safely, turn on the hazard lights, and check if the relevant fuse in the fuse box is intact. If you’re not confident in handling it yourself, don’t force it—visit a professional repair shop as soon as possible to avoid accidents caused by incorrect signals. Safe driving is paramount. Remember to avoid spraying water into the switch area when washing the car to prevent moisture damage.
