Grounding Points on an "80"
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
Don't have any pics but can tell you where some are.
Under the car the battery grd comes out of the box to the frame rail.
Passenger engine mount to the frame.
Antenna to the frame.
And I'm sure there's one or two more but I don't think it would affect your volt gauge....
Under the car the battery grd comes out of the box to the frame rail.
Passenger engine mount to the frame.
Antenna to the frame.
And I'm sure there's one or two more but I don't think it would affect your volt gauge....
Le Mans Master
Joined: Aug 2006
Posts: 7,427
Likes: 1,560
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Rear frame for tail lights, what circuit is giving you a problem?
No diagram but here's a schematic.
http://www.vetteprojects.com/bmv/mis...tte%201980.pdf
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
There is supposed to be a Bonding Strap on the passenger side valve cover to a stud on the firewall with the ground for the wiper motor and the blower motor. There is a large ground cable under the passenger side motor mount to the frame. There is a ground wire on the alternator mount to the main engine harness. #1 drivers side mount frame to body. Drivers side rear light harness (fuel gauge and lights) to frame next to the muffler and the antenna motor. Couple more up front for the forward light harness to the radiator core support.
Probably others I can't remember.
Probably others I can't remember.
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Thread Starter
Racer
Joined: Jan 2009
Posts: 462
Likes: 1
From: Westernport Maryland
Radiator support for headlights
Rear frame for tail lights, what circuit is giving you a problem?
No diagram but here's a schematic.
http://www.vetteprojects.com/bmv/mis...tte%201980.pdf
Rear frame for tail lights, what circuit is giving you a problem?
No diagram but here's a schematic.
http://www.vetteprojects.com/bmv/mis...tte%201980.pdf
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
Alternator not charge but tests good??? Hmmmm. Did you try reving the engine? Most new alt. are self exciting and you need to rev the engine up to 2000 rpm.
If that doesn't work, your gonna have to chase your 3 wires down and make sure they are connected.
Le Mans Master
Joined: Aug 2006
Posts: 7,427
Likes: 1,560
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
You sure that alternator is good?
If you take a reading from the out put terminal do you get about 13.8 volts?
If you take a reading from the out put terminal do you get about 13.8 volts?
Le Mans Master
Joined: Aug 2006
Posts: 7,427
Likes: 1,560
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
11 volts is not enough!
I'll take a guess that the regulator in your alternator is bad.
Try a new alternator and see if the problem is gone, if not return it and lets check the wiring.
Try a new alternator and see if the problem is gone, if not return it and lets check the wiring.
Thread Starter
Racer
Joined: Jan 2009
Posts: 462
Likes: 1
From: Westernport Maryland