Tach Signal feed.

I need some help... In my Chiltons nor my Haynes Manual I could not clearly see what I needed... So I will pose the question you all. I have a 90lx Mustang... used to be 2.3na but thank God she has the 2.3T now.

So what I need to know is wich of the wires is the Tach signal feed on the back of the instrument cluster. There is a large harness back there and I have not the foggiest clue wich is wich.

All and any help will be apreciated.
 
According to the EVTM and wiring diagrams for my '89 LX (should be the same as yours), your signal feed wire is circuit 11. It's a Dark Green w/Yellow striped 20 ga. wire, going to the - side of your coil. It'll be the only DG/Y wire in the bunch. Should be alot of fun to find! Good luck!