Ok so I did get some feedback about the tach wire , I was told yellow . Is there any other colors on the wire ? It appears I will use an after market tack. Next the Cooling fan wire color scheme ?? I am using a aftermarket adjustable fan switch hooked up to a sensor to read the temp of the radiator but it sucks! Once it's on It stays on ,, All Day ! Ohh Yea ,, You Guys Rock !

Do you have the manuals? I've got the 97 Impreza factory manuals if you need them. It would have all the wires and colors.

 

Let me know.