Which wire comes off the instrument cluster harness from the tach goes to the stock ECU or where does it come from.
I use to know what wire from the ECU goes to the tach but I cant find it or remember which wire is for the tach.

 

FD or FC? The FC tach is wired directly to one of the coils. So unless you clipped the wire, your tach should still work.

 

i have answered this for you already... no?