Okay, I'm screwed. I tried to wire everything like you said, I grounded it to the screw, tapped into the green wire, and even found a good spot for the switch...so I turn my car on, and not only do my dash lights not work, but I now have a CEL!!!! AAAHHHHRRRRRRRGGGGGGG. I knew I shouldn't try anything myself. Now what?? The only thing I can think of is that I used a different method of splicing the power. I have a small connector with 2 openings, where you put both wires and clamp down. A metal piece cuts through the covering of both wires and connects them. Well yeah, I need help!!!