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

Need help with 77 fuse panel

Thread Tools
 
Search this Thread
 
Old Jun 10, 2021 | 11:11 AM
  #21  
Heus's Avatar
Heus
Thread Starter
Instructor
 
Joined: Jun 2015
Posts: 193
Likes: 34
From: Ohio
Default

I suppose so if I needed to actually work on it. To just take a peak like I did splitting the interior pieces was sufficient. Thanks for all of your help.
Reply
Old Jun 10, 2021 | 12:33 PM
  #22  
stevedinino's Avatar
stevedinino
Racer
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Jan 2017
Posts: 271
Likes: 120
From: Rock Hill South Carolina
Default

My 77 is also an early build, and I had the same piece of insulation between the fuse block halves. I assumed it was intentional because mine was very neatly shaped to the outline of the fuse block. No idea why Chevy thought it necessary to dampen the unbearable noise coming from the fuses!

Is it possible Mr. Mouse did some nibbling on your wires near the fuse block? They love wires and it might be hidden from your view. Not easy to see much up under there.
Reply
Old Jun 10, 2021 | 03:31 PM
  #23  
Redvette2's Avatar
Redvette2
Drifting
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2013
Posts: 1,570
Likes: 485
From: Loud, Raw and Dangerous 1968 327 4S in Southern California
Default

Sometimes when the fuse lug is crimped on a wire the insulation gets in the way and results in a poor connection. Initially it still works but after a few decades of oxidation the circuit becomes intermittent.

Crimp lug connection.
Reply
Old Jun 12, 2021 | 08:06 AM
  #24  
fake's Avatar
fake
Safety Car
15 Year Member
Top Answer: 1
 
Joined: Jan 2004
Posts: 4,549
Likes: 343
From: Glastonbury CT
Default

I do not know if this will help try some CRC Electrical contact cleaner on contact points, fuse holders etc. This liquid will evaporate quickly and clean some not all rust that i see and might prevent future rust on contact points . ( crimped wire ends) When you split the block just use the wand supplied to adresss contact areas and let it evaporate the spray ,it will not hurt the plastic blocks.
Reply
Old Jun 15, 2021 | 08:46 AM
  #25  
Heus's Avatar
Heus
Thread Starter
Instructor
 
Joined: Jun 2015
Posts: 193
Likes: 34
From: Ohio
Default

Just a little update. I have driven the car a few times since I split the fuse block and put it back together. Everything has worked so far. Maybe just removing and reinstalling the 30 amp breaker is what fixed it? If things go bad again I will post back.
Reply
Old Jun 15, 2021 | 09:54 AM
  #26  
DblTrbl's Avatar
DblTrbl
Burning Brakes
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2013
Posts: 886
Likes: 471
From: Central NJ
Default

Originally Posted by Redvette2
Sometimes when the fuse lug is crimped on a wire the insulation gets in the way and results in a poor connection. Initially it still works but after a few decades of oxidation the circuit becomes intermittent.

Crimp lug connection.
This looks normal to me. There are two parts to the crimp joint. One part is the bare copper wire, not seen in this picture, and the second part, seen in this picture, is the insulation. Crimping the insulation keeps the copper from breaking at the end of the crimp joint.
Reply
Old Jun 15, 2021 | 03:42 PM
  #27  
Redvette2's Avatar
Redvette2
Drifting
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2013
Posts: 1,570
Likes: 485
From: Loud, Raw and Dangerous 1968 327 4S in Southern California
Default

I believe this is what is considered an open barrel terminal lug with only two areas that are part of the crimp...the one for the insulation and the one for the wire. Looking at the picture, only the middle one would pass inspection and the others could be suspect according to the inspection guide page below.










Reply
Old Jun 15, 2021 | 04:43 PM
  #28  
bmotojoe's Avatar
bmotojoe
Safety Car
15 Year Member
Photogenic
Photoriffic
Top Answer: 1
 
Joined: Oct 2007
Posts: 4,365
Likes: 1,727
From: Seattle Area Washington
Default

Originally Posted by Redvette2
I believe this is what is considered an open barrel terminal lug with only two areas that are part of the crimp...the one for the insulation and the one for the wire. Looking at the picture, only the middle one would pass inspection and the others could be suspect according to the inspection guide page below.



My understanding on the photo above is they want to see NO insulation in the single crimp area.
You pound out 1000's of #10 or even #12 wire crimps a shift and see if all your crimps look perfect...
If the completed harness passed circuit tests and QC it was bagged and tagged and sent to assemble line...
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-3

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-4

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
Old Jun 15, 2021 | 04:59 PM
  #29  
Redvette2's Avatar
Redvette2
Drifting
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2013
Posts: 1,570
Likes: 485
From: Loud, Raw and Dangerous 1968 327 4S in Southern California
Default

Yep...we have come a long way since then. Six sigma is one defect in 3.4 million!
Reply




All times are GMT -4. The time now is 05:51 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE