I began selling some mcculloch hid kits and a few people including myself ran into a problem with the aftermarket kit. The lights would flicker on and off repeatedly as if it wasn’t receiving enough power to ignite the ballast. I couldn’t exactly pinpoint where the problem was. Whether it was the oem relay or the small gauge oem wires. I kept sending kits back to the manufacturer thinking it was a defective ballast until Doug (slammedvwgolf) suggested the fore mentioned problem. I researched it online and it proved true.
Adding an independent relay can either fix a problem or avoid problems in the future. It’s very necessary if your hid kit is aftermarket, may not be necessary for oem kits. In my opinion I rather feed the ballasts their own juice straight from the battery since these cars weren’t designed for high intensity discharged lighting.

Ok enough yapping.. here’s the how-to-