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Message: <blockquote data-quote="mcglsr2" data-source="post: 1421733" data-attributes="member: 15705">Okay, this is how I wired up mine.  I will explain the image:<img src="http://i98.photobucket.com/albums/l248/mcglsr2/Mustang/Interior/Dash%20Re-Wire/05_Console_Wideband-amp-ECU.png" alt="" class="fr-fic fr-dii fr-draggable " style="" />The Zeitronix's are in the middle of the diagram. One for each bank, Left and Right.  On the Zeitronix, the simulated narrow band output is the purple wire.  To the right of the Zeitronix's in the diagram, is how I wired it into the ECU (you can ignore the connectors, they go into a common 'dash harness' I created - just look at the color of the wires).  On one Zeitronix, I changed the purple wire to dark green so I didn't have two purple wires going into the ECU.  I found the O2 sensor input using a wiring diagram, and tapped the appropriate purple/dark green wire into the specific input wire.  Thus, the Left Zeitronix is feeding the ECU a simulated narrow band on it's Left O2 input, which is what the ECU expects.  Same goes for the Right side.I then disconnected the OEM O2 sensor harnesses under the car, wrapped them to help keep water out, and just left them there.  I could have theoretically cut them off, but that would make it really hard to put a stock narrow band back in one day if I wanted to.Edit: Oh, and I should mention, the car runs fine.  The ECU is getting a narrow band signal just like it expects.  Also, a pretty cool feature of the Zeitronix, you can fiddle with the simulated narrow band a little.  It defaults to 14.7 as the switching point, but if you wanted to "trick" the ECU and have it switch at a higher or lower ratio, you can tell the Zeitronix to switch at a different ratio.  The computer will still think it's switching at 14.7, but instead it will be switching at the higher or lower ratio based on what you set in Zeitronix.  An easy way to get your car to run richer or leaner without changing anything.  Personally, I've never done this as I would rather end up tuning the car based on the wideband.  But a cool feature none-the-less.  I'm sure other quality brands would have a similar feature.</blockquote>