Tach no work help please now

[funguy]

Hi guys,

Just installed my electronic boost system, and now my stock tach has died. I never pulled the instrument cluster out, or anything. arg. this is so bugging me.

Here a pic i have, of a harness i found, anyone know if this is for the tach?
Wires= gray/blue and yellow/blue

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[funguy]

nevermind figured it out. the rpm signal wire from the turbosmart unit confused something and i unhooked. now my tach works again.