The power relay is optional, but recommended. It will protect your factory wiring by bypassing the stock harness and connecting the kit directly to your car battery. Xenon lights need 3x more power to turn on and may damage your factory wiring in the long run.
Warning Cancellers / Capacitors
Please note that some vehicles maybe require a set of warning cancellers to be installed. Warning cancellers, also known as capacitors, prevent on-dash errors that may occur on vehicles with complex onboard computers. The following is a list of makes that require warning cancellers.
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