stdefhatch

ok 1st off the guy i got my car from made a mess of wires for the headunit, sirius radio, autometer shift light that was integrated to light up in my cluster.
well my headunit took a **** and i got rid of the old unit, the sirius and the ipod box and the shift lights. now my tach in my cluster no longer works but the blue wire in the harness is still plugged into the cluster and running along in the oem harness to the dash.
Is there anywhere i can run that blue wire to like by the ecu harness to get my tach back?
sorry for the long story