# SR O2 sensor wire order \*pics\* **URL:** \ **Category:** SON240sx Automotive\ **Created:** [September 23, 2005, 2:23pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910 "2005-09-23T14:23:19Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [September 23, 2005, 2:23pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/1 "2005-09-23T14:23:19Z")
So my harness came with an O2 sensor plug but the plug was ripped off from the engine harness, and now I have 3 wires just hanging loose off my engine harness. I’m not sure what order the wires go in. The plug on the engine harness end is a female and the one on the O2 sensor is a male. The wire colours are also different on the male/females. Can someone quickly tell me what order they go in? So I can hook it up tonight? ---
**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\ **Post date:** [September 23, 2005, 2:33pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/2 "2005-09-23T14:33:27Z")
red - black - white not sure how to explain it but when looking @ the plug the lock for it/tab or what not is facing up when I say red - black - white also I lenghted the o2 sensor itself rather then the harness plug ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [September 23, 2005, 3:47pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/3 "2005-09-23T15:47:10Z")
So looking from behind the plug (where the wires go in) with the release clip on top, it’s RED - BLACK - WHITE? If so, then :bowdown: thank you sir I looked at my O2 wire and harness and was like wtf, wires were ripped out clean (not broken) from the female plug. ---
**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\ **Post date:** [September 23, 2005, 4:08pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/4 "2005-09-23T16:08:05Z")
![http://img.photobucket.com/albums/v508/Jedi_Car_Fan/Untitled-111.jpg](http://img.photobucket.com/albums/v508/Jedi_Car_Fan/Untitled-111.jpg) Looking @ the plug from the passengerside + clip up… left to right would be Red - Black - White not the greatest pic and im to lazy to actually go out and get a proper pic or what not but if you would rather that I will I suppose… ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [September 23, 2005, 4:13pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/5 "2005-09-23T16:13:11Z")
WTF, I have: BROWN (thin), BROWN/YELLOW (thin), WHITE (fat wire) On the O2 sensor itself, I have all thin wires in order: WHITE - BLACK - WHITE ---
**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\ **Post date:** [September 23, 2005, 4:17pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/6 "2005-09-23T16:17:16Z")
hmmm do you have a fat or skinny o2 ? I’ve got a skinny one… (if it matters) im not sure if the wiring/colour is different between the two The Flash on my camera doesnt work to good but I will go take as good of a picture as I can of the plug itself and the wire colours from the o2 itself as well as the other side of the plug leading into the harness ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [September 23, 2005, 4:19pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/7 "2005-09-23T16:19:46Z")
![http://240sx.cubicdesign.com/images/2005/srswap/sept23/o2_1.jpg](http://240sx.cubicdesign.com/images/2005/srswap/sept23/o2_1.jpg) ![http://240sx.cubicdesign.com/images/2005/srswap/sept23/o2_2.jpg](http://240sx.cubicdesign.com/images/2005/srswap/sept23/o2_2.jpg) ![http://240sx.cubicdesign.com/images/2005/srswap/sept23/o2_3.jpg](http://240sx.cubicdesign.com/images/2005/srswap/sept23/o2_3.jpg) ---
**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\ **Post date:** [September 23, 2005, 4:23pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/8 "2005-09-23T16:23:08Z")
my pictures are horrible… (so wont bother posting them) the harness end or what not of my plug has brown with a white stripe? white in the middle then solid brown on the outside so it would go brown/stripe (may be yellow?) - red… white - black… brown - white ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [September 23, 2005, 4:24pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/9 "2005-09-23T16:24:15Z")
> [@Jedi\_Car\_Fan](#): > > my pictures are horrible… (so wont bother posting them) > > the harness end or what not of my plug has brown with a white stripe? white in the middle then solid brown on the outside > > so it would go brown/stripe (may be yellow?) - red… white - black… brown - white Ah ok, cool. You were confusing me with red, black, white…i was like “there’s no red” :noes: Im gonna take your word for it… ---
**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\ **Post date:** [September 23, 2005, 4:25pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/10 "2005-09-23T16:25:17Z")
![http://img.photobucket.com/albums/v508/Jedi_Car_Fan/IM001738.jpg](http://img.photobucket.com/albums/v508/Jedi_Car_Fan/IM001738.jpg) you can tell it goes red - black - white from this picture but seeing the other end is tricky… it looks light brown - white - dark brown ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [September 23, 2005, 4:29pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/11 "2005-09-23T16:29:36Z")
^^^ 🤣 Dude I’m gettin old because I can’t see shit. ---
**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\ **Post date:** [September 26, 2005, 2:40pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/12 "2005-09-26T14:40:14Z")
> [@Gonad](#): > > On the O2 sensor itself, I have all thin wires in order: WHITE - BLACK - WHITE that is a blacktop 02… or a fatty i have the skinny redtop o2 which is why its red - black - white ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [September 26, 2005, 6:15pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/13 "2005-09-26T18:15:03Z")
Well I’ve been told it’s BROWN/YELLOW - WHITE - BROWN Looking from behind the plug (where wires enter) with the clip facing up ---
**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\ **Post date:** [September 26, 2005, 6:18pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/14 "2005-09-26T18:18:31Z")
> [@Gonad](#): > > Well I’ve been told it’s > > BROWN/YELLOW - WHITE - BROWN > > Looking from behind the plug (where wires enter) with the clip facing up Yes that would be correct (or same as mine from what I can tell) White wire is the signal wire incase you need to hook up an o2 ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [September 26, 2005, 6:26pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/15 "2005-09-26T18:26:00Z")
Ah ok, I was impression white was ground since it’s in the middle and mates up with a black wire on the O2 side. ---
**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\ **Post date:** [September 26, 2005, 7:31pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/16 "2005-09-26T19:31:08Z")
> [@Gonad](#): > > Ah ok, I was impression white was ground since it’s in the middle and > mates up with a black wire on the O2 side. was the only one giving me a volt signal so thats what i hooked up the gauge up too and it works… was 1.36v @ idle I believe white is also the colour on the pinout for the ecu for heated o2 sensor ---
**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\ **Post date:** [September 26, 2005, 7:36pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/17 "2005-09-26T19:36:30Z")
[http://sr20det.nismo.org/srtech.htm](http://sr20det.nismo.org/srtech.htm) 19 - Oxyen Sensor input (O2) - White ---
**Author:** ![coca\_cola](https://avatars.discourse-cdn.com/v4/letter/c/3ec8ea/32.png) [@coca\_cola](https://forums.speedlife.net/u/coca_cola)\ **Post date:** [September 27, 2005, 6:04am UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/18 "2005-09-27T06:04:56Z")
Sorry to but in but I’ve been having problems with the O2 sensor for my red top as well… I replaced the sensor and it did not help, I checked the 3 wires for power and I get no voltage from any of the three. I’m hoping that there is a broken wire some where between the ecu and the sensor so I’m going to start at the ecu and test from there. My questions are: for the O2 heater is it supposed to be 12v? and does it stay on from the time that the car is started until you shut it off (can I wire it to a 12v ignition on). I just checked at the ecu and I’m only getting .2 volts from the #19 pin at idle… The wire is alot thinner at the ecu than at the sensor. Is that normal? ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [September 27, 2005, 10:03am UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/19 "2005-09-27T10:03:31Z")
coca cola: Could be a ground issue. Try and grab a signal reading from as close to the O2 sensor as possible… If it’s good there, but not further down the wires, then it could be a bad wire/short somewhere. ---
**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\ **Post date:** [September 27, 2005, 12:54pm UTC](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910/20 "2005-09-27T12:54:37Z")
your suppose to hook the o2 wire (brown @ the harness near the battery) up to any 12v sorce (so ignition is fine) if you dont have power going to the o2 (from the engine harness) then that could be one reason your not getting a Volt reading… also… the SRs run stupid rich… you should get atleast 1.000V @ idle if not higher in the 1.20 range on a redtop o2… (wires are red - black - white) the middle wire “black” is the signal wire… on the harness side plug the colour is “white”. try taking a reading from the black wire on the otherside of the plug incase the plug is fired perhaps and the 2 prongs arent contacting ? ?? [Next page](https://forums.speedlife.net/t/sr-o2-sensor-wire-order-pics/88910.md?page=2)