C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Tach Not Working

Thread Tools
 
Search this Thread
 
Old Dec 6, 2021 | 08:28 PM
  #1  
DX31's Avatar
DX31
Thread Starter
5th Gear
 
Joined: Oct 2021
Posts: 5
Likes: 2
From: Wisconsin
Default Tach Not Working

Hello, the tach on my 1980 L82 suddenly stopped working while out on a drive this past summer. Finally got some time to figure out what's wrong with it. After removing the instrument panel from the dash, I removed the tach from the bezel and noticed burn marks on it. From reading other threads, I thought that I would just need a new tach board. After I received the board, I installed it and nothing. It won't even move when the ignition is turned on unlike the old one. I made sure it was getting power and that looked good. Checked the wire from the distributor and the tach filter but both look ok. Does anyone know what would be the problem? I am completely stumped.

Old tach board
Reply
Old Dec 6, 2021 | 08:57 PM
  #2  
interpon's Avatar
interpon
Le Mans Master
Supporting Member
All Eyes On Me
Liked
Loved
Community Favorite
 
Joined: Jun 2019
Posts: 7,649
Likes: 2,466
From: Indiana
Default

Where did you get board.?
when ignition on does it go to zero?
go to Willcox see site, check for voltage and ground..
you can also bench test the tach..at a min zero out

http://repairs.willcoxcorvette.com/w...-1978-1982.pdf

after that go to end of this thread…
https://www.corvetteforum.com/forums...-question.html

Last edited by interpon; Dec 7, 2021 at 07:49 AM.
Reply
Old Dec 6, 2021 | 10:07 PM
  #3  
DX31's Avatar
DX31
Thread Starter
5th Gear
 
Joined: Oct 2021
Posts: 5
Likes: 2
From: Wisconsin
Default

Originally Posted by interpon
Where did you get board.?
when ignition on does it go to zero?
go to Willcox see site, check for voltage groind..

http://repairs.willcoxcorvette.com/w...-1978-1982.pdf

after that go to end of this thread…
https://www.corvetteforum.com/forums...-question.html
Got it from Top Flight Automotive, and when ignition is on it doesn't move at all.
Reply
Old Dec 7, 2021 | 07:45 AM
  #4  
interpon's Avatar
interpon
Le Mans Master
Supporting Member
All Eyes On Me
Liked
Loved
Community Favorite
 
Joined: Jun 2019
Posts: 7,649
Likes: 2,466
From: Indiana
Default

Originally Posted by DX31
Got it from Top Flight Automotive, and when ignition is on it doesn't move at all.
go to the link i posted and secondarily this video

Reply
Old Dec 8, 2021 | 12:47 PM
  #5  
DX31's Avatar
DX31
Thread Starter
5th Gear
 
Joined: Oct 2021
Posts: 5
Likes: 2
From: Wisconsin
Default

Originally Posted by interpon
go to the link i posted and secondarily this video
https://youtu.be/1yc16CgTekA
Thanks for the links, I'll try it tonight.
Reply

Get notified of new replies

To Tach Not Working





All times are GMT -4. The time now is 08:04 PM.

story-0
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-1
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-2
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-3
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-4
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-5
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-6
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-7
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-8
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-9
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE