Morimoto Bi-Xenon MotoControl 9003/H4/HB2;

Due to the fact that your original low beam turns off when activating the high beam; without the proper harness your bi-xenon solenoids will drop, but the ballasts/lights will turn off! A headache for retrofitters. We make it easy with the MotoControl H4/9003 Bi-xenon relay harness. Designed to be completely plug-n-play, it's a seamless solution to keep your low and high beams under control. The advanced MotoControl 8-Pin Relay has a tiny built-in capacitor that stores and releases it's charge between mode changes. So even if there's a short gap between low and high beam signals from your car, your HID's will run smoothly.