Kia Rio Forum : “installang a tach.”

im guessing NOT FACTORY,their will be 4 wires colors red-black -white-green,red is powerput wire in a hot fuse,black is a ground,get a good ground,white is the tac light,hook to a fuse that is only hot when keyswitch is on,green wire hooks to NEG side of coil.on back side of tac will see a switch sets on 4-6-8.if your enging is a 4 cylender put on 4,mount,you are done,use a test light for the fuses.