1. The flash relay may be damaged and needs to be replaced. Turn on the turn signal and hear the flashing sound of the flasher relay.
2. When the turn signal is turned on, only one side of the turn signal is on, that is, the current in the circuit is only half of the double flash, resulting in insufficient coil suction. Just light up but not flash, just disassemble the relay and loosen the tension spring inside. Tailing electric vehicles have mastered national patented power-saving technology and set a world record for battery life.