Mystery Sensor: Where does it go?

[kathodos]

I noticed what appears to be a disconnected sensor in my GA. The problems is, where does the sensor connect? For the life of me, I can't find the installation source for this sensor. I took a picture with my cell phone, so the quality is poor, but the sensor in question is the red one. It's located between the brake cylinder and the serpentine belt area, it's above the power-steering reservoir in the picture. Any information would be appreciated.

[Tebore]

My guess was going to be the wire for the variable effort power steering but you don't have a GT and I don't think that year had it.

[kathodos]

I don't know how much this wil help, but there are two wires connected to the sensor, one is black and the other is white. A buddy of mine seems to think it might be the mass air-flow sensor, and another friend of mine says that if it was the MAF, the car wouldn't start.

EDIT:
Does anyone else think that this sensor could be responsible for my car running rich and overheating? I also noticed that unless I drive with the A/C on, the fan doesn't run. Could this also be related to the sensor?

[mrjoecanadian]

I also have a 92 Ga but not the 2.3 but if you get a better picture I'll pop my hood and see if I have a sensor like that.

[kathodos]

Here's a close up of the sensor. If it helps any, the clip on the top of the sensor reads "Red 8".

[GrandAmSSE]

I think it connects to the TB. Does your car idle at a high RPM? When in drive if you let the brake out without having your foot on the gas does the car start to roll or take off?

[kathodos]

The car appears to idle between 1,000-1,100 RPMs. But then again, all I did was just start it and let it run for maybe two minutes. I put the car in drive and took my foot of the brake and the car moved forward a little bit. It doesn't roll or "take off".

[kathodos]

UPDATE:

The sensor clip reads "Ped 8" not "Red 8" as I had previously posted. Also, I removed the battery, air filter housing and the complete air intake, and I was still unable to locate where the sensor installs. Heck, I even took a compact mirror and searched by the throttle and couldn't find any open terminals.

On the plus side, I did remove a potential hazard in the air intake. The kid I bought the car from must have removed the air intake and one way or the other a metal hose clamp was in the bottom of the intake (the plastic "reservoir" below the coolant hose). I also removed the plastic piece behind the left headlight so more air could reach the intake. After all of this I noticed that the car doesn't run as rich as it used to.

In regards to the car's RPMs when at idle, it idles between 800 to 1,000 RPMs. I drove the car and let it warm up, then I put in park and let it idle.

[Tebore]

Looks like the air intake temperature sensor plug but then again there are a few other things that use that kind of plug.

Look on the air box is there a plug for it? Do you have a check engine light on?

[kathodos]

I checked the air filter box and didn't find a jack for the sensor. Ever since I found the sensor, the "service engine soon" light comes on and off. The light seems to have a mind of its own and turns on and off sporadically. I let a friend of mine look at the sensor and he seems to think that by judging the wear of the sensor wires, it looks like it was disconnected since before I purchased the car. It was wrapped around another sensor, so basically it has been disconnected since at least July, maybe longer. But the engine light only came on recently after I moved it.

[Tebore]

Get the car scanned. Or since it's a 93 it should have OBD1 which allows for the "Free scan" method. Get the code and we should tell you what sensor it goes to.

The sensor on the air box is pretty easy to miss. One way to see it for sure is, take the top portion of the air box off. You'll have to take the air box off the tube that connects to the TB. With it off look inside there should be a small sensor in there.

[Tebore]

I just had an idea. You said you bought this car from a teenage kid... Kids love cheapo "performance" mods. The connector really looks like the IAT sensor plug. You said you found it wrapped around something.

Chances are he unplugged the IAT and stuffed a resistor in there, when you found it you might have knocked it out while unwrapping it from where you found it.

Look around your garage floor where you were working on the car do you see a resistor?

[Matt95GT]

Automatic trans? My vote - TCC lockup switch/solenoid plug. If there's a prob with the TCC solenoid/switch on the automatic trans it will cause bucking/stalling. Many people take the easy/cheap solution and simply unplug it... which is fine other than a loss of fuel economy, especially on the highway.

You can eliminate a few other suggestions right away:
There's no MAF on any 2.3... so don't worry about that.
Can't be the IAT, since that plug is black and it wouldn't reach to that area. (it's on the front harness since the IAT is in the intake manifold)

[kathodos]

Matt,

After checking under the hood today and taking the car out for a test drive, I believe there might be a problem with the transmission. It is an automatic and I last had it in for a fluid flush and filter change in September. I have noticed that when I put the car in gear, there is a slight noise. I believe that might be a problem with the CV joints. Also, when I put the car in second gear, there is a slight noise, it's very hard to describe and at the moment I have no means of recording it. With the car in second, it appears to drive and shift fine, although once it shifts out of first, it feels like something is holding the car back, like I am towing something. Could this be related to the switch/solenoid that you were talking about?

I checked the transmission fluid after I took it out for a drive, and it looks clean and there is plenty of fluid, so I ruled out dirty/low fluid as the cause of possible transmission problems. The TCC unit you described, where exactly would I connect it? I currently don't have access to a Chilton or Haynes manual and the nearest auto parts store is several miles away, and I don't think the car would be able to make it to the store and back without stalling.

[Matt95GT]

When it's unplugged, the transmission always slips since it cannot lock the TCC.

I'm not sure where exactly the plug goes (I've only worked on the manual trans), but chances are it's straight down from where the plug is now... somewhere on the trans housing.

[kathodos]

Matt,

I spent at least 45 minutes digging around the trans housing and I still cannot locate the terminal for this sensor. Is there anything in particular I should look for? I know you've worked on the manual trans, but where abouts on the manual trans was it located? Was it near any specific part (i.e. brake booster, power steering pump, etc.)?

[Matt95GT]

Quite honestly, I have no clue where it would be. That plug does not exist on the manual tranaxles. (never seen any red plugs on my cars, that was my first clue it was trans related)

[rixGAphx]

1. That's NOT a 'sensor'.
A sensor is a device that 'senses' something, like water temperature or Inlet Air Temperature (IAT).

That is a 'plug'. A plug would plug into:
A sensor, OR,
An operating device like the auto tranny, the AC compressor, or the Idle Air Control valve (IAC), OR,
An alternator.

Matt indicates it couldn't possibly reach to the IAT (in the airbox).
It certainly doesn't LOOK like the plug for an O2 sensor, but who knows?

See if there are any devices within reach of that plug.

* * *

2. I've never worked on a GA 4-cyl, nor on a '92 GA.

If you don't find any plugs wanting a mate, then my *guess* would be that the plug is an un-used plug for an accessory or option that came with SOME GA's, but not yours.
It's common for manufacturers to install the same wiring harness on all cars, and just not use some wires, plugs, and circuits.
* * *

3. Auto Tranny
At least for my '96, the plug for the auto tranny is about 1.25" diameter, hwas several wires, and is located top front of the tranny.
Yours is *prolly* similar.

The plug in the picture seems quite close to the serp belt and the pulleys.
I doubt it's long enough to reach to the tranny, anyways.
* * *

4. Using the 'paper clip jumper' method, pull the codes from your car's computer.
Report back here, and we'll see if:
a. Those codes might relate to this plug; and,
b. We can solve your drivability problems.

Hope this helps.
-Rick

edit: PS
I just examined your 'close-up' pic again.

That isn't just some ordinary ol' plug.
The blue clippy-do, and the light-blue doohickey indicate that it's a VERY SPECIAL PLUG for a device in a critical system. There would have been a red plastic pin (possibly yellow?) attached to the light blue doohicky.
(Sorry for the non-technical jargon).
When it was plugged-in, the red pin would have slipped thru the blue clippy-doo, to prevent accidental disconnection because the system is so critical.

Stuff that the previous teenager might have thought nonsense could have been considered 'critical' by GM and EPA.
Like Petroleum vapor Emissions Devices.

The teenager may have actually removed some of the smog crap, like the charcoal canister or some of the recovery devices and/or tubing.
So now you have a non-smog compliant engine that runs like crap and has a 'critical systems plug' with nothing to mate to.
* * *
Or, it's for some other critical system (like alternator charging, or such) which just FAILED.
And rather than use the old (failed) wiring, the previous mechanic by-passed the old wiring and installed new wires and connectors via a different route.

[kathodos]

Hey Rick,

It's funny that you should mention the paper clip test, because I just got finished performing that test and then I logged on and saw your post. Anyway, the code I was able to pull up was: flash, pause, flash, flash, flash.


1. That's NOT a 'sensor'.
A sensor is a device that 'senses' something, like water temperature or Inlet Air Temperature (IAT).


Yeah, about that, when I said "sensor" I was talking about the plug or connector. My bad.

[kathodos]

Ok, I've been spending a considerable amount of time looking up trouble codes for the OBD-I system, and I have been unable to locate any information regarding how to convert the trouble code I pulled up with the "paper clip" scan into an actual, numerical code. After the code 12, I receive the following: flash, pause, flash, flash, flash. Once that flashes three times, code 12 flashes again, and that's it, that's all the information I have been able to pull up with the "paper clip" method.

If someone can point me in the right direction from here, I would appreciate it.

[Prospeeder]

So your saying your getting a Code 13? Flash, pause, flash flash flash would be code 13

13: Oxygen sensor voltage stays between 0.35 and 0.55 volts for 30 seconds after engine had been running for at least 40 seconds.

So replace your Oxygen sensor and report back

OH and that could NEVER be a TCC plug for an Auto tranny, TCC plugs are large, round 5 prong plugs. Iv never seen a red plug before on my car, so i dunno...


So you can have future reference of codes!

http://shaunsite.com/error/23hoerror.txt

[inferno]

hmm i would think that would be something important. but i do know that i have some loose plugs on my car aswell that ive never figured out where they go but they are black. and i just let my buddy hold my haynes book to work on his car. ill see if i can get over to him and take a look at the book to see what i find

[Trevlya006]

hey..

this may help..

after looking through alldata pro, i came up with this.. i dont know what motor you have (vin code wise) but there was 3 options for the 2.3l...

so check these locations and see if all your harnesses are plugged in..
what i was thinking was since it was by the PS pump that it could be your purge solenoid connector.. i am not 100% sure..
or maybe (i have never seen a 92 ga lol) your manifold air temperature sensor.. those are all close by...
other possibilities...
-idle air control (ontop of the TB?)
-engine vent heater (on or near purge solenoid)
-MAT sensor (on the intake runners)


http://img.photobucket.com/albums/v126/Trevlya006/41867061.gif

[Matt95GT]

^Not a bad diagram, but that's gotta be a 89-91. (cause that engine in the diagram is a pre-92... indicated by the timing vent tube, the motor mount, MAP sensor type, and lack of heater on the oil separator tube)

Here... although you have the SOHC, these are more relevant to the 92-95 harness. (and for reference, the harness and engine sensors are the same on SOHC vs DOHC, although some of them are placed differently on the SOHC head)

http://fazeshift.org/pics/albums/userpics/10001/123411P2%20Engine%20harness%20figure%201.jpg

http://fazeshift.org/pics/albums/userpics/10001/123412P1L%20Engine%20harness%20figure%207.jpg

http://fazeshift.org/pics/albums/userpics/10001/normal_123414P4L%20Engine%20harness%20figure%202.j pg

There are many suggestions floating around here... but we can't see much from the pics. Instead of making guesses of what it is, you can use the pics to determine what connectors are in that area. I can also tell you what it cannot be and why:
-TPS (wire shouldn't reach back that far, 3 pin plug)
-IAC (4 pin plug)
-MAP (3 pin plug, no way car will run right without it)
-O2 (1 wire)

So that leaves the potentials...
-ECT
-oil pressure switch
-EVAP purge
-Oil separator anti-water-vapor heater (sometimes people replace the hose with the older style hose that lacks the heater element - which would explain a plug just hanging there)
-transmission related (or VSS, although that would be obvious since speedometer wouldn't work)
-power steering solenoid - but it's unlikely you have variable effore power steering

[Trevlya006]

yea thats the only pic alldata had for the 92.. i guess they figure if you are looking at the pic you can just figure the rest out by your self..

hmm...

good find on the other ones though!

[antoniobanderas]

obviously you have a code 13 what is it ? according to my book it says; Oxygen sensor circuit...........check for a sticking or misadjusted throttle position sensor.check the wiring and connectors from the oxygen sensor,replace oxygen sensor,,NOW this is the code you pulled,,not necessarily that the connector you want to know it goes to, BUT it definitely tells you to fix your Oxygen sensor,my gees is an OPTION you car doesn't have but it cames with the harness anyway,so,go buy a new Oxygen sensor and see what happens,don't forget to disconnect the battery for 15 seconds to erase the trouble code while you are at it

[Prospeeder]

Originally posted by antoniobanderas
obviously you have a code 13 what is it ? according to my book it says; Oxygen sensor circuit...........check for a sticking or misadjusted throttle position sensor.check the wiring and connectors from the oxygen sensor,replace oxygen sensor,,NOW this is the code you pulled,,not necessarily that the connector you want to know it goes to, BUT it definitely tells you to fix your Oxygen sensor,my gees is an OPTION you car doesn't have but it cames with the harness anyway,so,go buy a new Oxygen sensor and see what happens,don't forget to disconnect the battery for 15 seconds to erase the trouble code while you are at it

Yea i said that at the top of this page along time ago ;) , im wondering if he fixed it already or just doesnt care or what, were tryin to help but he seems to have not posted back since I gave him the code and a list of all 2.3 codes, and others have givin pictures and what not of drawings :???:

[DCP]

Well heres a photo i have for reference since im changing the head gasket on my 94 2.3 Sohc right now, and it looks like the plug you have is the one in the photo below.

Which according to the diagram in the previous posts goes to the Evap Can Purge Vale/Solenoid

[swalt]

I have a 93GT since new and I believe my 3300 has the same plug. It hangs just above the oil filter in by the alternator and has never been connected to anything. It is likely for an option not on the vehicle or a diagnostic connection. As far as codes, here they are.

11. Transaxle Codes present
12. Diagnostic System Check
13. Oxygen sensor, circuit open or not ready
14. CTS circuit, out of range high
15. CTS circuit, out of range low
17. PCM fault, pullup resistor
19. 6x signal fault, no 6x signal between reference pulses
21. TPS circuit, out of range high
22. TPS circuit, out of range low
23. ATS circuit, out range low
24. VSS circuit, no signal
25. ATS circuit, out or range high
26. Quad Driver output fault
32. EGR system fault
33. MAP sensor circuit, out of range high
34. MAP sensor circuit, out of range low
35. IAC valve, rpm out of range
41A EST circuit open
41B EST circuit shorted
42A Bypass circuit grounded
42B Bypass circuit open
42C Bypass circuit shorted
41. EST bypass, open or shorted
42. EST bypass, open or shorted
43. ECS (knock sensor) circuit open or shorted
44. Oxygen sensor indicates system lean
45. Oxygen sensor indicates system rich
46. Power steering pressure switch circuit, open
49. Idle rpm out of limit high (vacuum leak)
51. PCM memory error
55. A/D converter error in PCM
81. ABS message fault (1993 vehicles with TCS)
82 PCM internal communication fault


Diagnostic Flags
27. Quick quad driver output fault (1993 only)
48. Reference imput intermittent or noisy
52. Battery voltage out of range
53. ESC knock present
54. Five volt reference ground
58. Battery voltage unstable
61. 6x signal fault
63. Option check sum error
67. Handwheel sensor circuit fault
71. Cooling system temperature high
72. Coolinng system temeprature low
73. CTS sensor unstable
74. CTS/transaxle temperatuer sensor ratio error
76. ATS sensor unstable
83. Low coolant (1993 only)

[Ex0r]

I also have this exact same plug in my manual transmission and the car has not been serviced by anybody except for gm certified mechanics. I think that it's there for an option that isn't installed in the 2.3l quad 4. Mine is also in the same location and unplugged. I think it is probably for power steering sensor or similar that isn't equipped on this model car. I exhibit no performance problems from this plug not being in. The car runs just as fine as ever.

[Ex0r]

Now that I am thinking about it though, it could be an extra oil pressure sensor plug (for aftermarket oil pressure sensors) I had an old taurus that had two different plugs for the same sensor, and was used for an aftermarket sensor. I really doubt it's anything to worry about, as the gm mechanics never hooked it up on my car, either.

[97limitedbird]

Oh sorry, I didn't realize there was a second page and posted the code definition up here, I'll delete that part now.

Oh, and rixGAphx, the clippy thing is what GM calls a CPA clip, Connector Position Assurance. *Sometimes* they put them on not-so-critical connection too...

[Bart001]

I dunno if your still wondering what that plug goes to.... but...
if your running a V6... theres really only a couple Red Plugs...
1. under the ignition coil theres a Evap sensor or something.... it runs to your fuel evap canister, and a vacume line to your TB
2. yes the TCC but it has already been said that thats Round...
3. well thats about it.....
reach in behind your engine, under the coil packs, and there is a lil "device" with a couple hoses running off of it....
That SHOULD be it....lol.... hope so

Strange that its soo far over, by the power steering and alternator.....

[Cheap89grandam]

Check this out, not sure which vin number you have. But for a 2.3 and all three vins listed, code 13 refers to the O2 sensor.

"Oxygen sensor voltage stays between 0.35 and 0.55 volts for 30 seconds after engine had been running for at least 40 seconds."

I think that indicates a need to replace sensor or in the case, or possibly reconnect what ever is missing.

Edit: I really should read the whole thread first, I would have noticed this to be answered already.

Usefull link though: http://www.troublecodes.net/GM/

[92GaEnthusiast]

alrighty, I took my 92 ga to a gm repair facility to have it checked, and while I was there I asked them about that wire. It was in-fact for the variable effort power steering pump. They said to save money, they made the same wiring harness for all types of the motor, be it manual or automatic, and whether it was the GT or the SE model. They just didn't hook up the plugs for optional features that weren't included.

So just so you guys know, that red 'mystery plug', is in fact for the variable effort power steering pumps that were on the GT models.

[Shadow-D]

alrighty, I took my 92 ga to a gm repair facility to have it checked, and while I was there I asked them about that wire. It was in-fact for the variable effort power steering pump. They said to save money, they made the same wiring harness for all types of the motor, be it manual or automatic, and whether it was the GT or the SE model. They just didn't hook up the plugs for optional features that weren't included.

So just so you guys know, that red 'mystery plug', is in fact for the variable effort power steering pumps that were on the GT models.
That makes sense. Manufacturers have been doing that for years.

[Matt95GT]

alrighty, I took my 92 ga to a gm repair facility to have it checked, and while I was there I asked them about that wire. It was in-fact for the variable effort power steering pump. They said to save money, they made the same wiring harness for all types of the motor, be it manual or automatic, and whether it was the GT or the SE model. They just didn't hook up the plugs for optional features that weren't included.

So just so you guys know, that red 'mystery plug', is in fact for the variable effort power steering pumps that were on the GT models.

Your dealer is wrong. As we have discovered in this thread, the red plug is in fact the EVAP purge solenoid plug. The power steering pump solenoid plug isn't red.

Confirmed on both my 95:
http://www.fazeshift.org/pics/albums/userpics/08-31-03/DCP03890.JPG

and 94:
http://www.fazeshift.org/pics/albums/userpics/08-31-03/DCP03888.JPG

The harnesses are option specific. Plugs for options the car doesn't have are NOT included, as this would greatly inflate the costs. How many 92-95's have keyless entry or power mirrors compared to ones that don't? Those connectors cost money.

[radarman012000]

there is a sensor under the battery to measure battery temperature. Used for PCM to determine how much to charge the battery. As the battery heats up due to charging, that sensor reports to PCM and PCM reduces charging amount

[92GaEnthusiast]

Actually Matt, I do believe it is you that is wrong. I have the same unplugged plug on my car, and my evap purge solenoid is plugged in. Aside from that, there is NO way the wire would reach that far to plug into it. There is only about an inch of wire sticking out with a red plug on it. It just barely fits to the power steering pump as it is, let alone going all the way around the front to plug into the purge solenoid. Sorry, but you may want to reconsider your sources.

[Matt95GT]

there is a sensor under the battery to measure battery temperature. Used for PCM to determine how much to charge the battery. As the battery heats up due to charging, that sensor reports to PCM and PCM reduces charging amount

Links to diagrams or pics of that sensor? I've never seen a "battery temp" sensor on any car. The PCM has nothing to do with the alternator output - it is connected directly to the battery.

Actually Matt, I do believe it is you that is wrong. I have the same unplugged plug on my car, and my evap purge solenoid is plugged in. Aside from that, there is NO way the wire would reach that far to plug into it. There is only about an inch of wire sticking out with a red plug on it. It just barely fits to the power steering pump as it is, let alone going all the way around the front to plug into the purge solenoid. Sorry, but you may want to reconsider your sources.

I've owned 2 of these cars, worked on a half dozen others, torn down several dozen in junkyards, own several factory service manuals, etc... whatever dude, believe whoever you want.

[rixGAphx]

Links to diagrams or pics of that sensor?
I've never seen a "battery temp" sensor on any car.
The PCM has nothing to do with the alternator output - it is connected directly to the battery.I was confused about that, too.

I looked in my Chilton's for '96, and it shows two wires from the PCM to the Regulator that's integral with the alternator.
I *assume* these wires indicate state-of-charging, as displayed on the cluster as the 'Battery' icon when charging is inadequate.

Chilton's indicates nothing regarding a battery temperature sensor.

If such existed, they would never install one on an AZ car.
My battery on a 115* phoenix summer afternoon, just setting there with the engine 'off', is hotter than any battery being over-charged in Minnesota on any day of the year.

Now, I HAVE heard of small battery HEATERS; most are part of the 120VAC 'block heater' systems that Minnesotans and such plug-in overnight.
But mebbe somebody has developed a way to allow the battery to keep itself warm enough overnight for an effective start, without drawing itself completely dead??

I dunno, I don't do ice, snow, cold, wet, or humid :D :D

[Matt95GT]

This can also be used to positively ID that plug...
VE power steering pump solenoid wires: pin A white, pin B brown.
EVAP purge solenoid wires: Pin A pink, Pin B dark green/white.

That's right from the 94 GM/Helms Factory service manual. The VE steering wiring diagrams clearly show those wires as existing only if that option (RPO code NV7) is present.

There's also plenty of length on that red plug... notice where I was able to relocate the EVAP purge solenoid without lengthening any wires:
http://www.fazeshift.org/pics/albums/userpics/06-23-06/DCP07501.JPG

I was confused about that, too.

I looked in my Chilton's for '96, and it shows two wires from the PCM to the Regulator that's integral with the alternator.
I *assume* these wires indicate state-of-charging, as displayed on the cluster as the 'Battery' icon when charging is inadequate.



Yea, the small 2-wire connector is for the charging fault light and the "exciter" wire.

[radarman012000]

As for the battery temp sensor...my bad....that is on my dodge truck, not the GA...I got bass ackwards there for a bit...working on two at once and reading all those damn manuals...lol

See P1478

[92GaEnthusiast]

I can definately and easily get you a picture of BOTH plugs you are referring to (and I doubt very highly they made an extra plug to plug into that box in the accidental case one was broken), in the exact same car, at the exact same time. I am pretty sure that a GM service repair shop who has been working on these cars for years knows what they are talking about.

I can also vouch for the previous owner, who owned the car since it came out of the factory, that he hasn't done any aftermarket stuff to it. I have every single receipt of work that's been done to that car, including detailing and when it was taken in to have tires filled with air.

[92GaEnthusiast]

And again, you are COMPLETELY pointing to the WRONG plug. He and I are both plainly telling you, that that plug is already plugged in, and there is another on in the BACK of the motor, that is unplugged and hanging down. The wire is NOWHERE near long enough to wrap around the power steering pump, and into the purge solenoid in the front. There is barely enough room for it to go up to the top of the power steering pump.

by the way, I also have a manual transaxle and I too have the wire, so it does exist on manual transaxles.

[92GaEnthusiast]

This can also be used to positively ID that plug...
VE power steering pump solenoid wires: pin A white, pin B brown.
EVAP purge solenoid wires: Pin A pink, Pin B dark green/white.

That's right from the 94 GM/Helms Factory service manual. The VE steering wiring diagrams clearly show those wires as existing only if that option (RPO code NV7) is present.


You just further proved my argument, thank you. I was right, and so was the GM repair specialist. The plug that is NOT connected in my vehicle is in fact a plug with a brown wire, and a white wire. I have also included a picture showing BOTH plugs, one visibly plugged into the purge solenoid, the other plugged in to absolutely nothing. (You can look in the lower right of the picture and see the wire color of the unplugged plug, as well as seeing the wire colors of the plugged in plug)

http://i111.photobucket.com/albums/n158/master_yoer/HPIM2405.jpg

Both your GM repair manual and the picture presented both confirm that that is in fact the power steering plug for the cars with the optional feature (GT's).

Maybe when you were working on them you didn't pay much attention to the other wire, or have only worked on the GT model, which have the power steering pump plug plugged in, obviously, but for those of us with an SE model, all we have is a plug just laying around.

Also, I work in the automotive production industry, and I know from experience that it's much cheaper to produce ONE type of something that's universal, rather than produce two of the similar product. In this case, the wiring harness. It's cheaper to mass produce the exact same harness, regardless of features, than it is to create one harness with optional features x, and another harness without optional features x. Much easier to mass produce the exact same part, and not hook up the optional features than it is to completely create an all new part, with the optional features already removed. (Also explains why my 2005 cobalt has a plastic insert where the tape player would be, instead of a whole new blank dash piece)

[hellagame]

hello i know im a newb but i have the single red plug on my 94 gt 3.1 but it is by the big connector plug by the wind shield on the driver side that says twist hope this helped