Unknown Wire.
Thread Starter
5th Gear
Joined: Nov 2024
Posts: 5
Likes: 0
From: Oklahoma
Unknown Wire.
Hello I was hoping to figure out what this wire is and where it goes to I am currently working on my brothers 1989 Corvette and have been looking at my 1985 to figure out where it could run to on the 85 it seems to run to the wiring harness and I was guessing it would be the same for this 1989 but just wanted to see if anyone knew considering the 4 year age gap between the cars. I am currently working with limited knowledge and experience with the wiring on these cars since I am only 18, Thank you for any advice or help.
Melting Slicks
Joined: Nov 2016
Posts: 2,253
Likes: 3,075
From: So Cal
2023 C4 of the Year Finalist - Unmodified
It is the EGR diagnostic temp switch. On the 85 it is located in the base of the EGR valve, under the plenum. In the 86-89 (with aluminum heads) it is located in the external pipe from the RH exh manifold to the intake manifold. 90-91 do not use the switch.
If the switch is not detected 'closed' when EGR is being commanded, Code 32 will set.
If the switch is not detected 'closed' when EGR is being commanded, Code 32 will set.
Team Owner
Joined: Sep 2003
Posts: 25,388
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In this eBay offering you can see where and visualize.
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https://www.ebay.com/itm/39425010799...Bk9SR9qy1qLfZA
Thread Starter
5th Gear
Joined: Nov 2024
Posts: 5
Likes: 0
From: Oklahoma
Thank you guys for the help i really appreciate it they planned on deleting the egr so im guessing thats why it was such a headache to find because it is not currently in the car and I didn’t want to drag everything out of my 85 so i wasn’t able to see it fully lol.
Thread Starter
5th Gear
Joined: Nov 2024
Posts: 5
Likes: 0
From: Oklahoma
Sadly I do not have one for either car I’ve mostly got everything completed off of experience of working on my 85 I just haven’t ever had to deal with the wiring being such a mess like it is on his. That egr wire was my last loose end of wiring on the car thankfully.
