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Old 05-27-2009   #1
BC GTA
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Connector Melting

I have a 1989 Pontiac GTA. There is a wiring harness connector up by the firewall just above the plastic plenum extension. Two connectors clip together and are attached to a metal clip which is bolted to the firewall. The first connector has a black/green wire and a thick black wire going to it. The second connector has a light green, a green and a black wire going to it. The first connector is melting and breaking down.

Does anyone know what this connector is and where I could buy a replacement? I looked on TPI Parts but they do not seem to have it.
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Old 05-27-2009   #2
YumikoGTA
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Re: Connector Melting

I believe that the wire is for the EGR temperature sensor. Wow...that wire was the first thing that I had a problem with on my GTA in 1992. Yumiko
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Old 05-28-2009   #3
FearThisGTA
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GTA Year: 1991
GTA Engine: 350 TPI Automatic
Re: Connector Melting

It may be connectors to the EGR position sensor.
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Cliff Jones
1991 GTA Trans Am
w/305,231 miles
on the original motor!!!!
Time of Death on motor, 4:07pm on 05/29/2010.
Hp:211.2@4200rpms/Tq.328.5@2700rpms
Best et: 13.959@97.05mph
Best mph: 98.3
Best 60' : 1.875 on BFG Comp TA's w/ 32 lbs of air in them
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Old 05-28-2009   #4
BC GTA
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Re: Connector Melting

After much internet searching I have located two pictures of the connector. The first picture is shown below.
http://www.thirdgen.org/techboard/al...pictureid=2315

Off to the left had side up by the firewall by the large black tubing holding all the wires you will see one end of the connector which is black with the light green, green and black wires going into it. I know this is not too good but it is the best I could find.
The second picture shows a close up of the three wire connector.

http://www.thirdgen.org/techboard/el...ing-these.html

It is the big rectangular black middle connector not the green or grey connector. Does any one know what this connector is?
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Old 05-28-2009   #5
YumikoGTA
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Re: Connector Melting

Thank you for the pictures. That does not look at all like what I thought you were talking about, sorry. The green connector at the very top of the picture looks like the connector that goes into the Throttle Position Sensor. I have not seen a connector that has three smaller connectors like that before except for the throttle position sensor connector. The middle one looks sort of like what connects into the airconditioning pump. The bottom one I do not have any ideas. Good luck, sorry I could not be a better help.

Yumiko
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Old 05-29-2009   #6
FearThisGTA
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GTA Year: 1991
GTA Engine: 350 TPI Automatic
Re: Connector Melting

I will look when I get back home this am and see if I can see those plugs and where they go.
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Cliff Jones
1991 GTA Trans Am
w/305,231 miles
on the original motor!!!!
Time of Death on motor, 4:07pm on 05/29/2010.
Hp:211.2@4200rpms/Tq.328.5@2700rpms
Best et: 13.959@97.05mph
Best mph: 98.3
Best 60' : 1.875 on BFG Comp TA's w/ 32 lbs of air in them
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Old 05-29-2009   #7
merc3065
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Re: Connector Melting

Could be your Fanbox AC controls.

Digital dash or non digital?
If it's digital good luck finding the harness... How well are your artistry skills or is there any chance you can find a digicam?

A pic of your connector and it's location would be super helpful in ID-ing it
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Old 05-29-2009   #8
BC GTA
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Re: Connector Melting

I got the following response back from TPI Parts:

Hi, we do have the black connector in the photo, but we donít have the one that mates with it. I donít believe you will be able to find a new one easily. Your best bet is to grab one from a junkyard, as nearly all the 85-92 V6 and V8 Camaros and Firebirds have that connector. The connector itself rarely breaks, most of the problems with it involve a melted connector. Thatís usually because of excessive resistance on one of the circuits going through it.

Thank you,
TPI Parts

Now it comes down to two issues. First, I like to keep my car looking as stock as possible and would prefer to stay with the original connectors. However, second if this connector has just failed and is prone to failing I should consider upgrading to a better connector on both ends. What would you do?
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Old 05-29-2009   #9
FearThisGTA
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GTA Year: 1991
GTA Engine: 350 TPI Automatic
Re: Connector Melting

You may try Napa then. They may have that connector. hth
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Cliff Jones
1991 GTA Trans Am
w/305,231 miles
on the original motor!!!!
Time of Death on motor, 4:07pm on 05/29/2010.
Hp:211.2@4200rpms/Tq.328.5@2700rpms
Best et: 13.959@97.05mph
Best mph: 98.3
Best 60' : 1.875 on BFG Comp TA's w/ 32 lbs of air in them
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Old 05-29-2009   #10
GTA50
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Location: Chilliwack, B.C.
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Re: Connector Melting

BC GTA, since we both live in the same province, have you tried LordCo? The reason is that they seem to have access to just about everything on these cars and many of the parts are AC Delco.

Also, I'm hitting the wrecking yards next weekend (more parts for my first GTA) and I don't mind looking for you - especially now that there is a picture.

Hope that Also Helps.
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Old 05-30-2009   #11
BC GTA
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Re: Connector Melting

I tried GM, local auto wrecking yards and NAPA and no one had the connector. So I opted for a third option cut the connector out and crimp the wires together and buy a length of convoluted tubing from Lordco and place it over the wires. This produces a clean look and solves the problem.
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