HI, I had this working once, but my cable is MIA. I am attempting to hook up an AEM wideband to V2. I am pretty sure that on the RJ11 plug I hooked up black (pin 2) to ground and Yellow (pin 5) to the blue serial output of the AEM gauge. I tried to make another cable, but keep getting the message "Wideband O2 not found." Any help would be great. Thanks!