C3 Chassis Grounds
Thread Starter
Pro
Joined: Jun 2014
Posts: 705
Likes: 96
From: Ventura County CA
C3 Chassis Grounds
Is there a source for a list of the chassis grounds on a C3? For my C5 there is a guide and picture of all the grounds in the AIM.
I'm having weird problems with grounds.
I'm having weird problems with grounds.
Le Mans Master
Joined: Aug 2010
Posts: 5,339
Likes: 546
From: Central Texas
There isn't a "list" of grounds in the AIM. There are however detailed images showing the grounds for each system.
Craig
Pro
Joined: Nov 2016
Posts: 729
Likes: 118
From: Kelowna British Columbia
grounds
Beside starter at frame. Also from here there is a #6 cable to engine ground.
Below battery box at frame Negative from battery goes here.
Just below fuse box on birdcage does most of dash.
Ground goes thru center bezel and at top of bezel to metal under dash
On frame by rear taillights at frame.
There are probably more that others know but for a start find these and take apart and clean with emery cloth or wire brush and put back together.
Maybe mention where you are having weird problems
Thread Starter
Pro
Joined: Jun 2014
Posts: 705
Likes: 96
From: Ventura County CA
I'll chime in with the ones I know
Beside starter at frame. Also from here there is a #6 cable to engine ground.
Below battery box at frame Negative from battery goes here.
Just below fuse box on birdcage does most of dash.
Ground goes thru center bezel and at top of bezel to metal under dash
On frame by rear taillights at frame.
There are probably more that others know but for a start find these and take apart and clean with emery cloth or wire brush and put back together.
Maybe mention where you are having weird problems
Beside starter at frame. Also from here there is a #6 cable to engine ground.
Below battery box at frame Negative from battery goes here.
Just below fuse box on birdcage does most of dash.
Ground goes thru center bezel and at top of bezel to metal under dash
On frame by rear taillights at frame.
There are probably more that others know but for a start find these and take apart and clean with emery cloth or wire brush and put back together.
Maybe mention where you are having weird problems
Those two ground points have continuity to each other and each to the battery neg. Headlights only go on when I connect another ground to the radiator surround. I just don't get it.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Pro
Joined: Nov 2016
Posts: 729
Likes: 118
From: Kelowna British Columbia
What I do not understand is when I connect my test light to the horn relay hot point I get 12V at the radiator surround (grounded) and at the HL ground (grounded).
Those two ground points have continuity to each other and each to the battery neg. Headlights only go on when I connect another ground to the radiator surround. I just don't get it.
Those two ground points have continuity to each other and each to the battery neg. Headlights only go on when I connect another ground to the radiator surround. I just don't get it.
Thread Starter
Pro
Joined: Jun 2014
Posts: 705
Likes: 96
From: Ventura County CA
I had to find a good ground on the frame and run a separate ground to that point from the radiator surround. Lights work now.
Lifelong Vette Lover
Joined: Feb 2016
Posts: 176
Likes: 35
From: Naples FL
I also replaced the two ground straps from the center crossmember to the exhaust hangers. That made a big difference though I'm still trying to cure a slight problem when the headlights are on. Good luck!
Team Owner
Joined: Jun 2001
Posts: 23,363
Likes: 1,059
From: Virginia USA
This is what I used to clean up my grounding points. Couple of quick hits with one of these will clean any rust or paint (and powder coating) to make a good connection. When I first got the car I went through all the grounds that are easy to get to and replaced all the round eyelet connectors with new ones and soldered them on top of crimping them and cleaned the frame surface with the wire brush.
