I am getting an A/F meter soon, and how do I wire it in? Power and ground are the easy parts, but as to connecting it to the O2 sensor, do I need to go under the hood, or is there a signal wire inside the cabin? Anyone with one please help....pics would be greatly appreciated.

 

I believe that you need to splice the wire from the second O2 sensor. Which is, of course, under the hood. Someone please correct me if I am wrong.