So I went to the wrecking yard today and found two decent shape 4x4's which made me happy and sad, but i got the sport cluster ive been waiting so long for which I good. After I got it all installed I found that the tach does not work does anyone know what could be wrong? Is it most likely in the cluster or the wiring harness? I assume its pre wired since everything else works just fine, and I don't know what the wiring on the distributor looks like for the tach. Any ideas?