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3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Funny, I just wired mine up today, and mine didn't work at first, but I had some connections backwards.
But mine we did different than the directions, as I wired it to the battery like you are. We got rid of the relay on it, and just took the green wire to the battery. The yellow wire is the ground, I think just for the light on the switch. The blue wires are the grounds for the lights. I have mine grounded on the cross member. They work just fine.