# air fuel guage hookup
**URL:** https://forums.speedlife.net/t/air-fuel-guage-hookup/84102
**Category:** SON240sx Automotive
**Created:** [March 7, 2005, 3:21pm UTC](https://forums.speedlife.net/t/air-fuel-guage-hookup/84102 "2005-03-07T15:21:22Z")
**Posts on this page:** 10
**Page:** 1
### Author:  [@kay\_arsen](https://forums.speedlife.net/u/kay_arsen)
#### Post date: [March 7, 2005, 3:21pm UTC](https://forums.speedlife.net/t/air-fuel-guage-hookup/84102/1 "2005-03-07T15:21:22Z")
Ive searched for about an hour. anybody know how to hook up a air fuel guage wires to a ka which wire connects where thiers like 5 ends of wires and i dont no where they go any help would be much appreciated
---
### Author:  [@Titan](https://forums.speedlife.net/u/Titan)
#### Post date: [March 7, 2005, 4:02pm UTC](https://forums.speedlife.net/t/air-fuel-guage-hookup/84102/2 "2005-03-07T16:02:51Z")
5 wires?
There should be 3, IIRC.
Red - +12V
Black - Ground
Purple - O2 Signal To ECU
---
### Author:  [@kay\_arsen](https://forums.speedlife.net/u/kay_arsen)
#### Post date: [March 8, 2005, 6:18am UTC](https://forums.speedlife.net/t/air-fuel-guage-hookup/84102/3 "2005-03-08T06:18:01Z")
yeah thiers those 3 then 2 thicker red and black wires that go to an inverter and out the other end what does that hook up to ?
---
### Author:  [@Belluz](https://forums.speedlife.net/u/Belluz)
#### Post date: [March 8, 2005, 8:43am UTC](https://forums.speedlife.net/t/air-fuel-guage-hookup/84102/4 "2005-03-08T08:43:55Z")
the other 2 are for the light inside. hook those up to you ilumination
mike
---
### Author:  [@kay\_arsen](https://forums.speedlife.net/u/kay_arsen)
#### Post date: [March 9, 2005, 6:55am UTC](https://forums.speedlife.net/t/air-fuel-guage-hookup/84102/5 "2005-03-09T06:55:44Z")
alright thanks for the replys
one more question were is the o2 sensor located?
im a noob
---
### Author:  [@DarkForceJackal](https://forums.speedlife.net/u/DarkForceJackal)
#### Post date: [March 9, 2005, 8:00am UTC](https://forums.speedlife.net/t/air-fuel-guage-hookup/84102/6 "2005-03-09T08:00:54Z")
Should plug into your exhaust flow…so just follow your exhaust manifold down until you see it tapped in (wires protruding).
---
### Author:  [@Titan](https://forums.speedlife.net/u/Titan)
#### Post date: [March 9, 2005, 9:14am UTC](https://forums.speedlife.net/t/air-fuel-guage-hookup/84102/7 "2005-03-09T09:14:21Z")
> [@DarkForceJackal](#):
>
> Should plug into your exhaust flow…so just follow your exhaust manifold down until you see it tapped in (wires protruding).
Don’t just splice the wire in your engine bay, thats ghetto. Find the corresponding signal input to your ECU and wire it near there. You can find this in the FSM wiring schematic.
---
### Author:  [@Sasha\_SG](https://forums.speedlife.net/u/Sasha_SG)
#### Post date: [March 9, 2005, 11:32am UTC](https://forums.speedlife.net/t/air-fuel-guage-hookup/84102/8 "2005-03-09T11:32:14Z")
kay arsen what year is your 240
---
### Author:  [@kay\_arsen](https://forums.speedlife.net/u/kay_arsen)
#### Post date: [March 9, 2005, 3:37pm UTC](https://forums.speedlife.net/t/air-fuel-guage-hookup/84102/9 "2005-03-09T15:37:49Z")
alright im ready to go thanks
"95 240sx
---
### Author:  [@kay\_arsen](https://forums.speedlife.net/u/kay_arsen)
#### Post date: [March 9, 2005, 3:40pm UTC](https://forums.speedlife.net/t/air-fuel-guage-hookup/84102/10 "2005-03-09T15:40:44Z")
> [@Titan](#):
>
> [quote=DarkForceJackal]Should plug into your exhaust flow…so just follow your exhaust manifold down until you see it tapped in (wires protruding).
Don’t just splice the wire in your engine bay, thats ghetto. Find the corresponding signal input to your ECU and wire it near there. You can find this in the FSM wiring schematic.[/quote]
so i should wire it near the ecu under the right passenger side
alright