What are the reasons for car turn signals not lighting up?
1 Answers
There are many reasons why car turn signals may not light up, including possible causes such as open circuits, faulty flasher relays, excessive contact gap, and other factors. Open the flasher relay cover and check if the coil and resistor are intact. If the resistor heats up and the contacts cannot close, press the movable contact; if the turn signal lights up at this point, it indicates a relay malfunction. Adjust the contact gap if it is too large. If the turn signals do not light up when pressing the movable contact and the contacts close, use a screwdriver to short-circuit the contacts. If the lights come on, it indicates oxidized contacts. If the turn signals still do not light up, the turn signal switch may be faulty. Use a screwdriver to connect the turn signal switch's live wire to the left and right light wire terminals separately. If the lights come on, it means the turn signal switch is faulty and should be removed for repair or replacement. The function of car turn signals: To alert pedestrians and other vehicles of an upcoming turn or U-turn, as many areas are not visible while driving, so turning on the turn signals reminds others to avoid in time. On highways, when overtaking or changing lanes, using turn signals informs surrounding vehicles to prevent accidents. The flashing also indicates an emergency situation, typically used during unexpected incidents to alert other vehicles to stay safe. If the lights do not come on after activation, it indicates an open circuit in the wire between the flasher and the fuse. Check the location of the open circuit. If the lights stay on continuously after activation, replace the flasher relay fuse. If all lights flash when the hazard lights are pressed, it means the turn signal switch is damaged or there is an open circuit between the switch's live wire terminal and the wiring harness.
