C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Temp sensor question

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Old Jan 28, 2019 | 11:28 AM
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Default Temp sensor question

Good morning, I have been working to straighten out multiple electric issues on my Vette. The analog temp gauge does not work which I believe is causing some of the issues I am experiencing. I have identified that the wiring is bad. There are two wires. I am having a heck'uva time trying to find how to access this wire. I've been under the car, above it... it's a pain. I am thinking it may just be best to replace the whole wire back to it's source. Has anyone had any experience with this or advice? Thanks



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Old Jan 28, 2019 | 11:51 AM
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What causes you to believe a faulty analog sensor wire is causing problems other than the analog gage?
A more accurate temp gage is the digital gage. Unless the analog wire is causing other problems, just use
the digital gage for temp readings.

" There are two wires."....... what two wires concerns you? The analog temp sensor has only one wire.

Last edited by don hall; Jan 28, 2019 at 12:48 PM.
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Old Feb 4, 2019 | 01:51 PM
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Originally Posted by don hall
What causes you to believe a faulty analog sensor wire is causing problems other than the analog gage?
A more accurate temp gage is the digital gage. Unless the analog wire is causing other problems, just use
the digital gage for temp readings.

" There are two wires."....... what two wires concerns you? The analog temp sensor has only one wire.
There are so many electrical issues with this car I would like to repair everything so I can eliminate the possibility of anything causing an issue. To be honest, I don't see or know where to look for the digital reading? My understanding, and I could easily be wrong, is that the analog gauge not reading could also cause the car to run rich - but based on your response I believe I could be incorrect. Either way, I really would like for that gauge to work as well. Based on the codes I am seeing, I believe I may have a faulty ECM.
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Old Feb 4, 2019 | 02:00 PM
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I understand you want all items to work.

The digital temp reading is accessed by use of the buttons on the dash. Just scroll through the various categories, and you will find 'temp'.

The analog gage does not 'talk' to the ECM. It only has one wire. The digital gage does 'talk' to the ECM (2 wires).

The analog gage not working may be due to a faulty sensor. Simple, inexpensive swap to check.

I don't see any codes posted. Might help.
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Old Feb 4, 2019 | 02:26 PM
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Confirm your vette is an LT1 ('92-'96). If you don't have a factory manual, get one. Check eBay for availability.

The CD is considerably cheaper. Maybe some member will chime in, and let us know if the CD is acceptable.

Last edited by don hall; Feb 4, 2019 at 05:29 PM.
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Old Feb 4, 2019 | 03:42 PM
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Originally Posted by don hall
Confirm your vette is an LT1 ('92-'96). If you don't have a factory manual, get one. Check eBay for availability.
Confirmed... 1994 LT1

I will get the factory manual

The wire for that sensor is completely bad. It appears to actually have two wires running to the plug which was what I was trying to capture in the picture. One of the wires is completely cut off at the plug. I need to replace that whole wire to really do it correctly. I can't get my hands into where it's at, and I've looked at it from the top and underneath.
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