How to install a tachometer in a Honda Civic?

I did it in my 1994 DX Hatch by getting the instruments from a model that had a tach. The instrument cluster plugged right in. Now I have a tach along with a new speedo, and combined temp and gas guages. The wiring is already there and it works like a factory install. I think mine came from an EX, intended for an auto trans, but the lights showing the gear (between the temp and gas guages) simply don't come on. I imagine the same would work in any Civic from at least 1989 on, if not all. What year?