This wiring harness comes with everything you need to make your light "plug and play." Each harness comes with an inline fuse, relay, and switch. Simply install harness leads to the battery, plug into the light, and you are ready to go!
Loved everything about the harness except the switch. So, it would fit into a provided rocker switch cutout, I had to purchase an additional switch. I believe a good solution could be is to offer an option and/or an upgrade for a different style switch.