Tach Help

I have a 1997 Chevy Cavalier 2.2L and I never had a tach stock so I bought a tach and started to install it I got the positive, negative, and the dimmer hooked up but I am having a problem finding the wires that I need to hook it up to. In the paperwork it says that it needs to be hooked up to the ignition modual but I tired that and nothing worked. So I figured I would ask here and it is the same for years 1996-2001

what was the color of the wire you tried on the ignition module?

well there was a black and pink wire and I tried them both b/c the black didnt work (negative)

Would anyone else know how I would figure this out

thats what my question was for ;)