Outer Limits 4x4 Board

Gday,

Got a Tacho interface from v6 conversions at moree and i have hooked everything up as per instructions but it does not tell me which wire to put the output of the interface to on the 4 runner. I have looked over the wiring diagram for the 4 runner and i think it is a green wire but the one i thought it was does not work. I don't want to stuff anything so was wondering if anyone out there knew what wire i need to put it too and where the best place to find it is.

Any help appreciated.

Cheers

Dave

how many wires and what colors run from the tacho, multimeter the wires, one should be signal +, another will be ground test continuity to work that out, and the other should be the signal wire it would need to be connected to the output of the unit.