If u get on you tube and search smoke switch there's a video on there telling exactly how to do it which is how I did mine. If u can't find it I'll go look at mine and try to see which 2 I spliced. My memory aint so good but I thought it was a brown wire and black wire. One of them has power with the key on and the other is the ground I think too. Not sure what the other wire did but it doesnt need to be spliced. Youll knwo if u got it right theres a big difference in smoke.