Okay well, I had a pnp on HID on my accord then threw them on my parents car. But I debated about getting one for the civic, a whiter color temp ( 4300k ) and was wondering is a HID relay harness really necessary? I haven't really thought about the relays but I don't want to void my warranty or screw up any electrical parts. So, is the relay really necessary? I know it will be "insurance" that they wont fail, but I also need someone to explain how exactly it is wired. I have looked through past pages and also the DIY to making your own harness, but what boggles me is why do you use only one connector? I don't understand how the little "quick disconnects" connect into the ballast. Someone explain? thanks...