Aem Wideband Gauge Wiring Diagram. The door pillar trim had to be removed so the wires could be run. Attaching it to the original narrow-band signal.
It is not recommended to cut down the sensor harness, bit rubbish as there is way too. Thread is old but I'll toss my hat in, having an AEM gauge type UEGO. It is not strictly necessary to have a permanent wideband installed on your car in order to run a standalone ECU like the The white signal wire from the AEM gauge is fed into the engine bay, the same as the earth wire.
It is not recommended to cut down the sensor harness, bit rubbish as there is way too.
It provides a very fast and accurate display of the air/fuel ratio (AFR).
A white and brown wire comes off the main wideband harness. My gauge is in the radio trim, so I ran the serial wire (green in the photo, a soldered extension off the blue AEM wire) from the radio, behind the Select AEM UEGO. Find great deals on eBay for aem wideband gauge.