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switched power source for an AEM wideband?


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#1 thedarkie

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Posted 06 April 2017 - 12:30 PM

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!



#2 grannyknot

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Posted 06 April 2017 - 01:52 PM

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.



#3 thedarkie

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Posted 06 April 2017 - 02:09 PM

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?

 

Attached File  o2 wiring.jpg   49.34KB   1 downloads



#4 Greeko

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Posted 06 April 2017 - 03:54 PM

Yeah its heated - I think they all are. I definitely want a switched source.

 

Ok then since Im a dumbass, will this work?

 

attachicon.gifo2 wiring.jpg

 

Yup,

That will work.



#5 grannyknot

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Posted 08 April 2017 - 02:31 PM

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.






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