Digital speedometer not working
Thread Starter
7th Gear
Joined: Mar 2021
Posts: 7
Likes: 0
From: Huntington Indiana
Digital speedometer not working
My Digital speedometer is not working . When I purchased the vehicle the previous owner gave me a part that looks like a 4 X 4 dark piece of glass that he said was what was needed to fix the speedometer. The tach and all the other guages work fine. The 3 lights that display the speed light up but does not show my speed. My haynes manual says its the speedometer signal generator causing the malfunction. Does anyone know what I need to do to get my speedometer working?
Team Owner
Joined: Sep 2003
Posts: 25,394
Likes: 2,741
My Digital speedometer is not working . When I purchased the vehicle the previous owner gave me a part that looks like a 4 X 4 dark piece of glass that he said was what was needed to fix the speedometer. The tach and all the other guages work fine. The 3 lights that display the speed light up but does not show my speed. My haynes manual says its the speedometer signal generator causing the malfunction. Does anyone know what I need to do to get my speedometer working?
Drifting
Joined: Nov 2018
Posts: 1,800
Likes: 579
From: Mays Landing, NJ
Go to www.batee.com and watch the youtube vids they have to get a better idea of problems and cures for those problems,
Drifting
Joined: Apr 2020
Posts: 1,925
Likes: 610
From: Orange, CA
My Digital speedometer is not working . When I purchased the vehicle the previous owner gave me a part that looks like a 4 X 4 dark piece of glass that he said was what was needed to fix the speedometer. The tach and all the other guages work fine. The 3 lights that display the speed light up but does not show my speed. My haynes manual says its the speedometer signal generator causing the malfunction. Does anyone know what I need to do to get my speedometer working?
When you say "the speedometer doesn't show any speed" and "is not working," do any of the other digital parts of the center display work? Fuel level, fuel economy, etc? Is the speed just displaying '0 MPH' all the time? Or is the entire orange center digital area completely blank?
If the center area is blank, then as CorvetteRules said, BATEE has a walkthrough on what to do with that "piece of glass" the previous owner gave you (or they can do the repair for you). If the center area isn't blank but the speedo just isn't working, that's different and we can go from there.
Good luck!
Thread Starter
7th Gear
Joined: Mar 2021
Posts: 7
Likes: 0
From: Huntington Indiana
All gauges work except speedometer
the three square Orange blanks where speedometer lights up Does light up, the numbers do not display the speed when driving my 84 corvette. All the other guages function properly. Does anyone know what I need to do to fix my speedometer?
Team Owner
Joined: Sep 2003
Posts: 25,394
Likes: 2,741
Does the 'odometer' move/function?
Last edited by WVZR-1; Mar 27, 2021 at 11:18 AM.
Drifting
Joined: Apr 2020
Posts: 1,925
Likes: 610
From: Orange, CA
"The numbers do not display the speed." Does this mean it always displays "000," or does this mean that no numbers are visible? There's a pretty significant difference between the two. One means the gauge itself needs fixing, the other means there's likely an issue with a speed sensor.
Thread Starter
7th Gear
Joined: Mar 2021
Posts: 7
Likes: 0
From: Huntington Indiana
The three squares are lit no visible numbers
Just three squares lit noVisible numbers. The odometer does work all gauges on the dash work but no numbers are displayed on the speedometer
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Drifting
Joined: Apr 2020
Posts: 1,925
Likes: 610
From: Orange, CA
If there are no numbers whatsoever, it's the gauge itself that's faulty, and the previous owner gave you the parts to fix it. As CorvetteRules said right in the second reply to the thread, BATEE.com is your friend. They have videos on how to do the fix yourself, or you can take the gauge cluster out and send it to them to have them repair it for you.
Safety Car
Joined: Aug 2009
Posts: 3,751
Likes: 276
From: Melbourne, Victoria, Australia
Hi
Try looking at the digital display with "sunglasses" uv light causes the polarizing film to fade, if it shows the speed with sunglasses on then you need to replace the polarizing film on the glass. Batee has the kits available on ebay.
The dark piece of glass maybe a replacement speedo display glass with the polarizing film, the dash should look dark with good non faded polarizing film. Unless the back light is working, removing the dash and disassembling it can be daunting but pretty straight forward.
The circuit board has these rubber looking connector things, between the glass display lens that need to be positioned correctly to work properly. I highly recommend you replace the 12 pin board connector sets at the same time they are the root of most backlight problems due to bad connections, as well as going to xenon or led bulbs as the original backlight's would overheat the circuit board. see links below.
https://www.ebay.com/itm/LED-Replace...YAAOSwMTdgRlDN
https://www.ebay.com/itm/Backlight-R...AAAOSwU~VegCDG
https://www.ebay.com/itm/LCD-Repair-...oAAOSwf11egBcS
Try looking at the digital display with "sunglasses" uv light causes the polarizing film to fade, if it shows the speed with sunglasses on then you need to replace the polarizing film on the glass. Batee has the kits available on ebay.
The dark piece of glass maybe a replacement speedo display glass with the polarizing film, the dash should look dark with good non faded polarizing film. Unless the back light is working, removing the dash and disassembling it can be daunting but pretty straight forward.
The circuit board has these rubber looking connector things, between the glass display lens that need to be positioned correctly to work properly. I highly recommend you replace the 12 pin board connector sets at the same time they are the root of most backlight problems due to bad connections, as well as going to xenon or led bulbs as the original backlight's would overheat the circuit board. see links below.
https://www.ebay.com/itm/LED-Replace...YAAOSwMTdgRlDN
https://www.ebay.com/itm/Backlight-R...AAAOSwU~VegCDG
https://www.ebay.com/itm/LCD-Repair-...oAAOSwf11egBcS
Last edited by gerardvg; Mar 28, 2021 at 09:52 PM.