The line group directly takes power from the battery, and the xenon lamp power does not pass through the original car harness, but is directly powered by the reinforcing wire group. The original wiring only serves a control function, ensuring no impact on the original vehicle system, while also resolving issues related to xenon lamp startup failures caused by aging in older vehicles. The special wiring group (also known as a power relay harness) draws power directly from the battery and includes independent relays and fuses, providing enhanced protection for the original vehicle wiring. This improves stability, strengthens performance, and reduces strain on the original car switch. Due to the high starting current of HID lamps, and because original vehicle systems are typically designed for halogen bulbs, some models may have insufficient headlight wiring capacity. Installing HID lamps without an additional wiring harness may result in both lights failing to start simultaneously. Therefore, using an enhanced wiring harness ensures more stable xenon lamp performance, lower failure rates, and extended service life, effectively protecting both the HID xenon lamp and your vehicle. Name: Relay harness Application: Automotive HID H11/880 headlights to strengthen the wiring harness Color: Black Material: Plastic Package Contents: 1 x Harness Note: Light and display differences may cause slight variations in color between the image and the actual item. Measurement allows an error of +/- 1-3 cm.