The relay harness use the power directly from the vehicle battery & solve many flickering issues.  However we recommend installing the relay harness to guarantee no electrical surge. The relay harness comes equipped with 20A fuse.

Specially designed for vehicles with various electrical issues (e.g. Flickering) using HID Xenon lighting systems. This wire relay kit includes relays to ensure sufficient and stable electrical voltage/current for the HID Xenon systems to operate properly, and extends the life span of the HID Xenon lighting systems. Integrated replaceable fuses provide additional protection against overload and unstable electrical power.