Red wire needs to be tapped to a 12V wire (you can use the same wire that goes to cigarette ligher) Black wire goes to a ground white wire goes to a light source wire (you also can use the cigarette lighter light bulb, to find out which wire of the 2 bulb wires is the one you need to tap it to your tac, get a vlot memter and hook it up to one of the wires and turn the head lights on and see if by doing so your volt memter reads 12V only when the lights are on.
green wire goes to your RPM signal wire (it's the only solid white wire by your ECU connectores)
