where do we conect the input wire that's supposed to be connected to tach signal

 

You mean to get the RPM signal? You can either use the TAM screw behind the instrument cluster or the RPM signal wire on the ECU harness. I personally used the RPM signal wire on the ECU harness. Check your FSM or Haynes or Chiltons to find out what color it is.

 

White with a green stripe if you go the ECU route

 

tam screw is easy, no cutting/splicing

 

i used the wire behind the cluster,, i still had to solder though

 

my rpm wire was blue w/ white strip on teh ecu