help with wire id

I have done exhaustive searches on this and other forums and cant seem to come up with a solid conclusion. What I'm trying to find out is the identification of the four wires behind the dash next to the ignition that were for the stock clock (which mine did not come with). I'm adding an aftermarket tach and was wondering if any or all of those wires would work for the switched 12v, ground, or illumination wires. Any help is appreciated.

Edit: I have a 95 4cyl 4x4 5spd, which im told was one of the years where the wiring was different from most of the others.