DAMN MAN JUST DO WHAT HE SAID. I have done this to a DX cluster, blue... baby blue, there is no difference, its blue isnt it? If you want the info ASAP then use it... dont just sit there and say, but, even if....

You asked, got a straight answer, take out the cluster, find the blue wire, and hook it to that, and then find the black wire, hook the ground to that, and then find the yellow wire and hook it to that...

One question, why are you useing a aftermarket tach if you already have one?