wiring new tach in 95 gt please help

[95ponygt]

just wanted to know how to wire up my autometer tach with my stock instrument cluster. what wires go where. Please help

 

[Blackened302]

i think the main signal from the tack goes to the coil wire?

 

[95cobraguy]

there should be 4 wires coming out of the tach
black-ground
red-key on 12v source
green-tach signal (tan wire at coil)
white-12v source for lights, so when the headlights come on so does the tach light