Outer Limits 4x4 Board

Hey guys,

just picked up an elcheapo Speco tacho off a mate to stick in my zook, but we've not got the diagram?

Now I'm a complete electrical neut, but should be able to sort this...anyone know what wires go to what? Red, Black, White and Green?

cheers

usually coil + and -

lights "on" and earth

no idea other than tho

red, ignition power (coil positive)
black earth
white illumination
green coil negative

most other tachos are the same too

red +12v
green - on coil
black ground
white lights +12v

thankyou gentlemens...

done..thanks again guys!