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Topic: Ground??

in Forum: C3 Electrical


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Ground?? (1/4)
 4/16/10 1:29pm
pspeck
Former Member

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Swartz Creek MI, MI - USA

Vette(s):
1976 stingray


Joined: 4/16/2010
Posts: 1

I am having a multitude of problems that i need help with. My taillights are dim, I have no brake lights, my interior gauge lights are spoadic ( I am replacing Switch today), when I step on the brakes my gas gauge and volt meter (drawing a blank on proper name) die off but when i start the car my volt meter reads +40 and then dies back to 0. I believe the light issue are a ground but i cannot find the straps. Any suggestions would be great.
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Ground?? (2/4)
 4/16/10 1:47pm
cthulhuLifetime Member
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Hot Springs, AR - USA

Vette(s):
69 Conv #'s match 427, TKO-600/.64, 3.36HD-Posi, HT, T/T, PS, PB, PW, SP, Leather, Comp XE264HR & Roller Rockers & Lifters, Air-Gap RPM intake, Holley St Av 770 VS, MSD 6AL+Dist+Blaster SS, K&N, Jet-Hot Hooker Side-Pipes, Steeroids, Al Rad, Spal Fans


Joined: 4/24/2004
Posts: 3231

one is by the #1 body mount on the drivers side.



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Ground?? (3/4)
 4/16/10 11:08pm
Adams' AppleLifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 20128

There are electrical grounds literally everywhere on these cars. Each and every system will have it's own ground, some more than one.
The tail/brake light grounds are on the rear bumper support, and/or on the driver side frame rail at the rear.
The gauges are also separately grounded thru the circuit board, and several grounds in/around the radio mount behind the cluster.
The main ground from the battery is just under the driver seat, to the chassis. Then, there is a large cable from the frame, to the passenger side engine mount area.
Check thse first, and see that they are clean and tight.
Welcome to C3VR, btw!


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Ground?? (4/4)
 4/17/10 12:13am
VeteransVette73
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Flat Rock, MI - USA

Vette(s):
L48 coupe, red on red.


Joined: 4/4/2010
Posts: 14

Good info, have a ground short here also.  Just got a schematic of my 73 and need to do some digging.  The previous owner just let a 2 amp trickle charger instead of disconnecting battery.
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