Electrical Ground Points
Thread Starter
Intermediate
Joined: Mar 2013
Posts: 29
Likes: 0
From: Fremont CA
Electrical Ground Points
Thanks to you guys, I have finally diagnosed my electrical problems as some bad ground connection. 
Poking around the window motor with my multimeter just confirmed it.
Yesterday I washed the car, and after starting the car, EVERYTHING WORKED AGAIN
!! All the dials worked, the tach, the windows, everything- til the car dried off. 
If someone could point me to where all of the electrical ground points on the car are, that would really help me! I searched through the mitchell and chilton manuals to no avail. Pictures would be awesome, or even just a description of where the ground points physically are and how to get to them. Any tips on checking and fixing grounds would be greatly appreciated.
Poking around the window motor with my multimeter just confirmed it.Yesterday I washed the car, and after starting the car, EVERYTHING WORKED AGAIN
!! All the dials worked, the tach, the windows, everything- til the car dried off. If someone could point me to where all of the electrical ground points on the car are, that would really help me! I searched through the mitchell and chilton manuals to no avail. Pictures would be awesome, or even just a description of where the ground points physically are and how to get to them. Any tips on checking and fixing grounds would be greatly appreciated.
Melting Slicks
Joined: Mar 2009
Posts: 3,126
Likes: 15
Pics. of my '77. mike...
The first pic. shows the ground from the engine to the frame.The black wire in the second pic. is for the starter wiring and is attached to the bell housing to motor bolt. The third pic. shows the ground on the back of the alternator. The negative cable from the battery is attached to the frame but I can not find a pic. at this time. There are many more throughout the car.
Bill beat me. Bill, did I ever tell you that you are Weird?
The first pic. shows the ground from the engine to the frame.The black wire in the second pic. is for the starter wiring and is attached to the bell housing to motor bolt. The third pic. shows the ground on the back of the alternator. The negative cable from the battery is attached to the frame but I can not find a pic. at this time. There are many more throughout the car.
Bill beat me. Bill, did I ever tell you that you are Weird?
Last edited by mds3013; Apr 3, 2013 at 07:51 PM.
Melting Slicks
Joined: Mar 2007
Posts: 2,520
Likes: 11
From: Hinckley OH
In addition to the main ground from the battery, my '74 also has one on the driver's side of the radiatior support, one under the front driver's fender at the body mount and one on the rear driver's side frame (a wire and a flat metal extension from the radio antenna). I believe there are also several ground wires under the dash and console.
Burning Brakes
Joined: Dec 2008
Posts: 971
Likes: 45
From: Middlesex NJ
In addition to the main ground from the battery, my '74 also has one on the driver's side of the radiatior support, one under the front driver's fender at the body mount and one on the rear driver's side frame (a wire and a flat metal extension from the radio antenna). I believe there are also several ground wires under the dash and console.
Dont know about 76 or 74 but my 69 has or had ground wires at the number 1 body mount from the rocker channel down to the frame / body mount. Could explain while wet some stuff worked as it may have gotten wet. Then like above youve got grounds that go to the birdcage behind the dash that need to carry over to your tach and center console.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Le Mans Master
Joined: Nov 2016
Posts: 9,215
Likes: 943
From: Lake Tahoe, CA
One on the rear drivers side frame for the antenna.
Drivers side #2 body mount uses a copper strap clip on style. May be on the opposite side too, I don't recall.
Radiator frame. Drivers side, one or two black wires from harness.
Metal support across the front for the headlights.
From the battery compartment just to the drivers side of the rear crossmember /snubber differential connection/emergency brake line bracket.
Inside birdcage/drivers side just above #2 mount
Cross bracket underneath shifter
there may have been one under the dash are towards pass side.
Look for 7/16" holes ( motor mount & Battery ground ) and smaller 5/16" (?) taillights, gas tank, antenna
Photo download not working on this GD forum. I'll try and post later.