thedarkie Posted April 6, 2017 Share Posted April 6, 2017 Hey guys Those of you running wideband O2s , does it need a direct source from the battery (via a relay or something?) or can I tap off something else in the cabin? I'm a total electrical dummy, and Im not sure if this is a particularly "sensitive" device that needs steady voltage from the battery, something that it otherwise might not get if its daisy-chained to other electrics in the car? Sorry if its a dumb question, I need to ensure Im doing it properly so as not to get false readings or burn through the gauge/sensor! Its an AEM X-series gauge with LSU sensor. The manual basically just says it needs 12-14v on the red wire and (-) on the black - pretty straight forward. Thanks! Quote Link to comment Share on other sites More sharing options...
grannyknot Posted April 6, 2017 Share Posted April 6, 2017 I had a AEM wideband running on my last Z, I just T'ed it into a switched power wire and it worked fine. I can't remember if the O2 sensor was heated or not but if yours is you will want switched power as well or the heater will drain the battery. Quote Link to comment Share on other sites More sharing options...
thedarkie Posted April 6, 2017 Author Share Posted April 6, 2017 I had a AEM wideband running on my last Z, I just T'ed it into a switched power wire and it worked fine. I can't remember if the O2 sensor was heated or not but if yours is you will want switched power as well or the heater will drain the battery. Yeah its heated - I think they all are. I definitely want a switched source. Ok then since Im a dumbass, will this work? Quote Link to comment Share on other sites More sharing options...
Greeko Posted April 6, 2017 Share Posted April 6, 2017 Yeah its heated - I think they all are. I definitely want a switched source. Ok then since Im a dumbass, will this work? o2 wiring.jpg Yup, That will work. Quote Link to comment Share on other sites More sharing options...
grannyknot Posted April 8, 2017 Share Posted April 8, 2017 power from the ignition switch and ground go to 85 and 86, power from battery and O2 go to 30 and 87 on the relay, if there is a 87a don't use it at all. Quote Link to comment Share on other sites More sharing options...
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