Is it required for us to connect the HID set to the battery for power supply or can it be powered using the stock wiring? Also does HD Relay take care of grounding or does it have to be grounded no matter what?
Any HID kit you buy should come with whatever you need to hook up the bulbs. That'll include bulbs, ballasts and any wiring in between to connect them with the stock components. Does that make sense? I'm pretty much asleep today LOL.