I have an 03 Camry and I just bought a Xentec HID conversion kit for my 9006 low beams. The kit came with 5000k lights, 2 ballast, and the wiring. The kit is a plug and play kit, so it didn't come with a in line fuse wiring harness, it just plugs into my factory plug and works fine. My question is do I need a wiring harness to use to draw the power from my battery, will it mess up my cars electrical system if I continue to run it without the wiring harness?