Hey all I have a question, I'm working on a car, 91 civic Si, putting a b16a in it. He has a Autometer Tach and I was wondering what wire do I tap into to get the signal. I know it sounds like a dumd question but I want to see how many different answers I get or if I'm just not looking at the diagram for the harness right.

 

...the blue one... I think

 

Correct...solid blue is the tach wire

 

the solid blue one going to the distributor. Its on the two wire plug that also has a black/yellow stripe wire to it.

 

tap into the wire going to the ECU
B15

and who cares what color it is.~!!!!!