If you’re installing an LED kit in a vehicle equipped with PWM (pulse-width-modulation) headlight technology. The Anti-Flicker Harness is required to eliminate the flicker of the headlights.

Newer vehicles use PWM technology to increase bulb-life and reduce fuel consumption by sending a pulse of alternating voltages to the headlight bulb, as opposed to a stable 12V. Factory installed incandescent or halogen bulbs can handle this pulse system, as they won’t dim before the next pulse of power is received. However, an LED kit or HID kit requires constant power and will flicker if installed in a vehicle with a PWM headlight system. The Anti-Flicker Harness is designed to ensure that your headlights don’t flicker, and eliminate “lamp-out” error codes.

For example, 2009 and newer Dodge Ram trucks all use PWM to control their headlights, and in some instances the fog lights also. Some vehicles even use PWM technology to control reverse lights and other signal lights around the vehicle. It is also common to see a PWM style CANBUS system used in Jeep Wrangler, Ford Focus and the new Chevrolet trucks, and more.

Simply plug the PWM module into the vehicle headlight connector and plug the other end into the LED headlight system.