PLUG AND PLAY For Ford F-150 (2018 2019 2020)Headlight . Condition is "New". These harness are intended to correct hyper flashing of the headlight if you have installed LED BULBS or installed after market headlights and they have began to hyperflash PLEASE MAKE SURE THE 3 PIN PLUG SEEN IN OUR PICTURE   . There are high quality resistors installed that must be mounted to metal in the trucks core support.