Ok, search all over and the wire colors behind my tach doesn't match any of the schematics that I have. Here are the wires:
Gonna hook directly up to the black/red wire next.
I've also hooked it up directly to the #2 pin off the EDIS6 module, according to this: http://forums.hybridz.org/index.php/topic/72457-edis-and-tach-not-working/page__p__688402__hl__tach__fromsearch__1#entry688402