Speedmetal Universal Flash LED Turn Signal Relay Replacing the original equipment incandescent bulb turn signals with LED lights without replacing the turn signal flasher relay may cause the LED lights to blink very quickly or not at all. The SpeedMetal Flash LED Relay is designed for use with LED lights and will correct the problem. Features: Corrects LED lights with rapid flashing or no-flash when replacing standard incandescent lights Universal fit Flash LED Relay may require cutting or splicing of wires