Tachometer and Instrument Cluster Problems
Thread Starter
Heel & Toe
Joined: Apr 2022
Posts: 16
Likes: 0
From: Hobe Sound
Tachometer and Instrument Cluster Problems
I have a 1977 corvette that is having some problems with the gauges. The water temp and oil temp both work along with fuel but my clock and my volt meter don’t work. Also my tachometer doesn’t work but that’s not really a big deal since I can just listen to the engine to know when to shift, I’d still like it to work though. Any possible solutions?
Racer
Joined: Jan 2017
Posts: 271
Likes: 120
From: Rock Hill South Carolina
These are most likely separate problems.
Tach is electronic and then boards are known to go bad. Check Willcox; he makes a board that’s an upgrade from the original. I put one in mine and am happy with it.
Clock is mechanical and the points inside get burned after years of use and stop working. If you’re handy you might be able to take it apart and repair it. Otherwise there are quartz replacements that are more reliable and look like original.
Volt meter is more problematic. You would need to provide more info. Could be a wiring problem inside the car, or bubba may have replaced the alternator and just “forgot” to hook up the brown wire that feeds the gauge.
No matter what, sounds like you are going to be disassembling some/all of the dash. Not a fun job.
Good luck, hope this helps.
Tach is electronic and then boards are known to go bad. Check Willcox; he makes a board that’s an upgrade from the original. I put one in mine and am happy with it.
Clock is mechanical and the points inside get burned after years of use and stop working. If you’re handy you might be able to take it apart and repair it. Otherwise there are quartz replacements that are more reliable and look like original.
Volt meter is more problematic. You would need to provide more info. Could be a wiring problem inside the car, or bubba may have replaced the alternator and just “forgot” to hook up the brown wire that feeds the gauge.
No matter what, sounds like you are going to be disassembling some/all of the dash. Not a fun job.
Good luck, hope this helps.
Le Mans Master
Joined: Jun 2019
Posts: 7,624
Likes: 2,454
From: Indiana
here is a clock
https://www.corvetteforum.com/forums...ck-repair.html
here is tach... post 4
https://www.corvetteforum.com/forums...ck-repair.html
and a 79 tach conclusion post 140!
https://www.corvetteforum.com/forums...uestion-7.html
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,033
Likes: 9,155
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Make sure the grounds are clean and connected as well
