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Forum namePerformance/Engine
Topic subjectA/F gauge wiring ?
Topic URLhttps://forums.2gnt.com/dcboard.php?az=show_topic&forum=i5&topic_id=31641
31641, A/F gauge wiring ?
Posted by 1TuffRS, Sep-01-02 03:55 PM
OK, I got the autometer A/F gauge so I can put my pillar to use. My question concerns the wiring. Which wire do I need to tap into at the ECU? Also, where did you guys wire the power wire too (it has to turn on and off with the ignition) TIA
31642, RE: A/F gauge wiring ?
Posted by optimuspeterson, Sep-01-02 04:01 PM
assuming you didn't know this but there is a post about a/f in the "seen this before" section. has eveything you will need
31643, RE: A/F gauge wiring ?
Posted by BlackVenge, Sep-01-02 04:26 PM
tap into the black wire with the white stripe at the ecu, and you can run the power into the fuse box and tie it into the radio fuse.
31644, RE: A/F gauge wiring ?
Posted by dudasd, Sep-01-02 05:22 PM
Toney just get with Doug, you forget he did mine since he needed to solder the wiring together for it, wait a second....weren;t uyou there when we did it????? Your gonna need the connection soldered so just get with him and hook it up.....:)
31645, RE: A/F gauge wiring ?
Posted by UFO, Sep-02-02 02:42 AM
>tap into the black wire with the white stripe at the ecu,
>and you can run the power into the fuse box and tie it into
>the radio fuse.

WAIT!.....
I think the O2 wire is a WHITE WIRE WITH BLACK STRIPE. :)

2G UFO
31646, RE: A/F gauge wiring ?
Posted by 420aVenger, Sep-02-02 02:49 AM
>>>I think the O2 wire is a WHITE WIRE WITH BLACK STRIPE.<<<

That sounds like the power wire.
31647, RE: A/F gauge wiring ?
Posted by BlackVenge, Sep-02-02 02:58 AM
youre right, it is the white wire with the black stripe. my fault
31648, RE: A/F gauge wiring ?
Posted by 1TuffRS, Sep-02-02 03:06 AM
Thanks guys, ill check the things weve seen before section
31649, RE: A/F gauge wiring ?
Posted by John99RS, Sep-12-02 04:54 AM
Tony, my write up is in the mods section.
31650, RE: A/F gauge wiring ?
Posted by Stan2gnt, Sep-12-02 05:00 AM
use the positive (blue wire) and neg wire from the cigarette lighter connection, its easy to get too, just pull the left side panel on the center console.
31651, RE: A/F gauge wiring ?
Posted by 1TuffRS, Sep-12-02 11:00 AM
Ill definitely try that out Stan, cuz Ive got the gauge wired to my stereo power and ground right now and not only does it not work unless the radio is off, but when the radio is on the bass doesnt hit as hard and the music sounds distorted like I need an amp. Is that how you had all your gauges wired?
31652, RE: A/F gauge wiring ?
Posted by XtremeRS, Sep-12-02 11:11 AM
I have *heard* that using any other ground than by the ECU can cause some faulty readings, its just a thought. I ran my signal wire from the white/black at the ECU, and a ground where the ECU is grounded, and ran that into the car. I tapped into my ignition cylinder wireing for switched power for all my gauges.
31653, RE: A/F gauge wiring ?
Posted by 1TuffRS, Sep-12-02 01:49 PM
OK well let me ask you this, did you use the chassis ground that is on the drivers side fender or did you use one that was right off the ECU like the signal wire? Also how do I get to the ignition wire that you used? Sorry for the questions, but I want to be absolutely sure that I get this right. When hooking up the gauge I had problems with my car. It seemed like the car was dumping a shitload of gas in and was making it stumble, it sounded like it had some very radical cams in it.
31654, RE: A/F gauge wiring ?
Posted by XtremeRS, Sep-12-02 02:09 PM
>OK well let me ask you this, did you use the chassis ground
>that is on the drivers side fender or did you use one that
>was right off the ECU like the signal wire? Also how do I
>get to the ignition wire that you used? Sorry for the
>questions, but I want to be absolutely sure that I get this
>right. When hooking up the gauge I had problems with my car.
>It seemed like the car was dumping a shitload of gas in and
>was making it stumble, it sounded like it had some very
>radical cams in it.


Find a blue/black wire at the ignition cylinder harness under the driver dash. This is the accessory wire, which is 12volt swithced. I used the ground at the chassis by the ECU, the one on the driver side, its the one you were talking about above. I just took that ground off, used a file to get down to bare metal around that hole, and used a ring terminal and a wire and bolted it back down. Then ran that along with the o2 signal wire into the car. No probs what so ever like this.
31655, RE: A/F gauge wiring ?
Posted by 1TuffRS, Sep-13-02 02:00 AM
thanks a lot man