Well I havent failed yet but feel like Im going to. I just bought a set of bixenon (55w) h4's and (35w) h10's for my taco, gotem from DDM Tuning. I was told to get the relay harness just to be safe and so I ordered 2, one for the fogs and the other for the hi/low beams. I just got the set today and my question is, what does the relay harness actually do and does the hi/low controller come with one already? What does the relay harness plug into?
My understanding is that the relay harness allows for you to draw power directly from the battery, does this mean that both my fogs and hi/lows should be connected to the battery with the harnesS?