I haven't found any info on how to hook it up through the signal wire behind the instrument cluster but a buddy of mine said to just hook the green wire to a12v power source(battery?) them ground the black wire and that the red one goes to the constant flow wire on the ignition coil. This seems correct to me except hooking the power wire straight to the battery, id rather hook it up where it comes on when i start the car (maybe through the fuse box???) but im not sure if thats necessarily safe or how to attach a wire to a fuse without any adapters. Thanks Geezer101 for that bit of info on the wire behing the instrument cluster; im definitely going to look more into that more.