This wiring harness is only required if you are having problems with
1. HID flickering
2. HID not turning on
This happends on certain Bike/ATV models with electronic computers or poor electrical systems. This wire harness gets power directly from the battery instead of your connect by use of a relay. This product is not required for most bikes/atv's.
This products wires may need to be shortened for most applications as its very long (originally designed for length of a vehicles hood.