DDM Tuning Heavy Duty Single Relay HID Harness: Universal 9006 Inputs / Outputs, 1 Year Warranty-FBA Single Relay Heavy Duty Xenon Conversion HID Harness, 1 Year Warranty Designed to supply proper current and voltage to the HID system by using the stock wiring as a trigger for the relay. Plug and play use with all DDM HID kits (as well as most on the market). Use this relay harness to connect HIDs to cars with very small gauge wiring that cannot supply the initial surge current required to light the bulbs reliably. Symptoms indicating the harness is required would be intermittent starting or lights going out after being turned on for several minutes and requiring you to turn the lights off and back on for them to turn back on again. Power is drawn through a single 40A relay to allow both ballasts direct power from the battery through a fused power wire. Wire length from relay: Power: 32 inch Ground: 7 inch (grounded at each output) Input / Output 1: 18 inch Input / Output 2: 68 inch