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Old Mar 4, 2019 | 10:47 PM
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I recently bought a 1984 corvette. It came with a handful of problems but the engine and trans is good. The problem I’m having right now is the speed sensor, I get a code “24”. I am not sure what to replace or look for. I am trying to do everything myself to the best of my ability because I am 16 and am trying to do things myself.
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Old Mar 5, 2019 | 08:18 AM
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To DIY you need factory service manuals. It will have information related to how things work along with repair procedures. Code 24 relates to vehicle speed sensor. Does speedometer work?
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Old Mar 5, 2019 | 09:36 AM
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Originally Posted by Kevova
To DIY you need factory service manuals. It will have information related to how things work along with repair procedures. Code 24 relates to vehicle speed sensor. Does speedometer work?
w

No the speedometer does not work but everything else does. The car did not come with a manual but I have found a pdf of one on the internet but on that one I can’t seem to find anything that has to do with the speed sensor.
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Old Mar 5, 2019 | 10:02 AM
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VSS or vehicle speed sensor mounts on transmission. It has a 2 wire plug could just be disconnected, wiring damaged. If you remove sensor and spin gear while someone else watches speedometer with key on to see if needle moves. If it does something is wrong with speedometer gears.
Batee.com has information related to cluster.
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Old Mar 5, 2019 | 01:09 PM
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Originally Posted by Kevova
VSS or vehicle speed sensor mounts on transmission. It has a 2 wire plug could just be disconnected, wiring damaged. If you remove sensor and spin gear while someone else watches speedometer with key on to see if needle moves. If it does something is wrong with speedometer gears.
Batee.com has information related to cluster.
So is it underneath the car where the chords are located?
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Old Mar 5, 2019 | 02:26 PM
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Looks something like this, Use large pliers to remove.
Here is what you need to work on that 84. Don't throw random parts at problems though. Diagnose first!
Search eBay of Amazon for a factory service manual (FSM). It is different that the owner's manual and gives detailed diagnostic and disassembly/assembly instructions with pics and diagrams. It will save you hundreds and thousands of dollars.
I like to buy used parts from www,vette2vette,com and new from www.corvettecental.com. Call Corvette Central and get their catalog.

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Old Mar 5, 2019 | 02:36 PM
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Originally Posted by corvetteronw
Looks something like this, Use large pliers to remove.
Here is what you need to work on that 84. Don't throw random parts at problems though. Diagnose first!
Search eBay of Amazon for a factory service manual (FSM). It is different that the owner's manual and gives detailed diagnostic and disassembly/assembly instructions with pics and diagrams. It will save you hundreds and thousands of dollars.
I like to buy used parts from www,vette2vette,com and new from www.corvettecental.com. Call Corvette Central and get their catalog.
Thank u so much!
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Old Mar 5, 2019 | 04:47 PM
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The picture above is of a speedo sensor with a mechanical cable. Yours will look nothing like that. It is in the same location; the drivers tailshaft and have a connector with a green and black wire. Often this connector can be knocked loose. Check this first.

Last edited by 383vett; Mar 5, 2019 at 04:48 PM.
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Old Mar 5, 2019 | 05:12 PM
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Originally Posted by 383vett
The picture above is of a speedo sensor with a mechanical cable. Yours will look nothing like that. It is in the same location; the drivers tailshaft and have a connector with a green and black wire. Often this connector can be knocked loose. Check this first.
I'm with 383. Your speed sensor will look nothing like that.



Here is a better shot of the tailshaft housing. The round spot is where the sensor sits.

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Old Mar 6, 2019 | 07:25 PM
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Originally Posted by 383vett
The picture above is of a speedo sensor with a mechanical cable. Yours will look nothing like that. It is in the same location; the drivers tailshaft and have a connector with a green and black wire. Often this connector can be knocked loose. Check this first.
I found the green and black wire but it is just connected to two connectors that are dangling
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Old Mar 6, 2019 | 10:43 PM
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Are they connected?
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Old Mar 6, 2019 | 10:44 PM
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No they look like they connect to the same thing
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Old Mar 6, 2019 | 10:46 PM
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Post some pictures.
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Old Mar 6, 2019 | 11:02 PM
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Originally Posted by ChumpVette
Post some pictures.

Last edited by Jakeliving; Mar 6, 2019 at 11:11 PM.
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Old Mar 7, 2019 | 02:37 AM
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Those look to be the connectors for the 2nd or 4th gear solenoid and the back up switch (light green wire) for the Doug Nash Overdrive unit. These would not have any bearing on your speedo issue.

Old image I had showing the view up of the different sensors. Please clean them before plugging them in.


Last edited by ChumpVette; Mar 7, 2019 at 02:38 AM.
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Old Mar 7, 2019 | 01:11 PM
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Originally Posted by ChumpVette
Those look to be the connectors for the 2nd or 4th gear solenoid and the back up switch (light green wire) for the Doug Nash Overdrive unit. These would not have any bearing on your speedo issue.

Old image I had showing the view up of the different sensors. Please clean them before plugging them in.
So where is this under the car??
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Old Mar 7, 2019 | 09:26 PM
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It’s just right above the area you took a picture of yesterday. All the sensor openings point towards the ground.
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Old Mar 8, 2019 | 08:48 PM
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Originally Posted by ChumpVette
It’s just right above the area you took a picture of yesterday. All the sensor openings point towards the ground.
i still can’t find the area it is in
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