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#259689 - 11/02/12 05:26 AM ALL CHEVS ARE NEGATIVE GROUND
Bill Barker Offline
Previous ChatMaster


Registered: 11/20/01
Posts: 5746
Loc: Issaquah, WA
All Chevrolets are grounded NEGATIVE.
None of them were ever positive grounded.

Note: Some GMC trucks were positive ground, however.
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#259713 - 11/02/12 01:35 PM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: Bill Barker]
glyn Offline

1000

Registered: 02/04/02
Posts: 1178
Loc: Helena Mt
I owned a 51 Jimmy PU for a short time. it was a positive ground but the previous owner had installed the battery incorrectly, took me a little time to figure out what was going on. talk

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#259768 - 11/03/12 01:06 AM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: glyn]
Bill Barker Offline
Previous ChatMaster


Registered: 11/20/01
Posts: 5746
Loc: Issaquah, WA
Ha ha.... Good story. And that's why I left this thread (announcement) unlocked!

--I didn't mean to laugh at your misfortune, but it sure was educational. bonk

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#259903 - 11/04/12 09:53 AM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: Bill Barker]
blueyAU Offline

pumpjockey

Registered: 05/13/11
Posts: 822
Loc: Australia.
mine is negative ground and its an Australian 34 standard, so there for all you disbelievers the America's and the Falkland islands..

Goose Green lives forever... :aust:

Peter
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#259912 - 11/04/12 12:57 PM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: blueyAU]
brewster Offline




Registered: 11/05/07
Posts: 3299
Loc: Ontario,Canada
Originally Posted By: blueyAU
mine is negative ground and its an Australian 34 standard, so there for all you disbelievers the America's and the Falkland islands..


But then again,your toilet water "grounds" wrong too!! flush
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Those accustomed to the finest...find it in Chevrolet.

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#270430 - 02/13/13 03:42 AM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: brewster]
junkyardjeff Offline

1000

Registered: 01/17/07
Posts: 1195
Loc: Dayton Ohio
25 years ago I bought a 50 GMC off a neighbor and was suprised it was positive ground,I was used to that in the Fords and Mopars I had at the time but was the first with a GM product.
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#273829 - 03/24/13 04:04 AM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: Bill Barker]
Sam Hamilton Offline
Shade Tree Mechanic

Registered: 02/21/07
Posts: 160
Loc: Oklahoma
When I asked this question in November, last year:
Is the battery in a '32 Chevy negative ground or positive ground?
Is the same true for '29, '30 and '31?
Why is something so basic so hard to learn from period manuals?

MrMack suggested that I was an idiot not to know that Chevrolets are always Negatively grounded. As proof he mentioned that GMCs were positively grounded.
MrMack and Bill are correct, Chevrolets are all negatively grounded.
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Heart of Route 66 Region (Okla) VCCA
Chevys: 1929 LQ 1.5T; 1930 LR 1.5T; 1932 BA 5 pass coupe; 1941 Chevy 1.5T US Army Fire Truck, my vintage '82 Chevy Motor Home

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#300914 - 02/09/14 07:41 PM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: Bill Barker]
Captain Harley Offline

Backyard Mechanic

Registered: 11/02/02
Posts: 238
Loc: Ridge Manor, FL
I'm running a 946C Chevy genny with a positive grnd on a '31
Model-A {you know what} and it works great! nanana What I want to know is can I convert to 12 volt without any problems?
The coil, bulbs & horn will be properly changed or converted. crazy

I still have my '29 Chevy when I want to drive somewhere and when I want to work on something, well, ya'll know the answer to that. freak

Capt. Harley Agrin
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Capt. Harley

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#327404 - 12/08/14 06:33 PM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: Captain Harley]
42special Offline

Shade Tree Mechanic

Registered: 11/12/14
Posts: 181
Loc: Idaho
My 1941 Chevy 1 1/2T cargo truck is positive ground. but it is a military truck and they were only this way for a very short time.

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#327407 - 12/08/14 07:23 PM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: 42special]
Chev Nut Offline




Registered: 01/08/02
Posts: 24989
Loc: West Allis,Wi.
Does it have a GMC egine? That could make the difference.
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#327426 - 12/08/14 09:50 PM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: Chev Nut]
Ken_Naber Offline

1000

Registered: 09/19/08
Posts: 1044
Loc: CHICAGO, IL
my 53 Packard is positive ground


Edited by Ken_Naber (12/08/14 09:50 PM)
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I have a 1927 Chevy Capital AA 4 Door also a 1927 Chevy Touring car, a 1936 Chevy 1/2 ton and a 2010 Corvette LT3 Convertible and a 1953 Packard Caribbean. My tow car is a 2011 Suburban.

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#327454 - 12/09/14 12:34 AM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: Ken_Naber]
Junkyard Dog Offline




Registered: 11/23/01
Posts: 28629
Loc: Eagle Point, Oregon
Right......but a Packard is not a Chevrolet!

laugh wink beer2

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"If It's Not Junk.....It's Not Treasure!"

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#327477 - 12/09/14 02:15 AM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: Junkyard Dog]
junkyardjeff Offline

1000

Registered: 01/17/07
Posts: 1195
Loc: Dayton Ohio
It seems like most non GM were positive ground until they went to 12 volts.
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#327572 - 12/10/14 03:36 AM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: Chev Nut]
42special Offline

Shade Tree Mechanic

Registered: 11/12/14
Posts: 181
Loc: Idaho
Hi Gene it is the stock 235 The big voltage regulator on the firewall has 6V positive ground on the tag. They military did switch in 42 to negative ground.

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#368529 - 05/16/16 01:40 PM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: 42special]
CGM_31567 Offline
Grease Monkey

Registered: 04/27/16
Posts: 29
Loc: DFW Metroplex, Texas
New guy here so bear with me if the title of the thread hasn't quite sunk in just yet.

I've got a '31 5-window coupe that is currently wired positive ground. The ammeter shows discharge when hooked up this way, it turns the starter, and the lights and horn work.

Upon turning the battery around thereby hooking it up negative to ground the ammeter shows charging.

SO my understanding is that it is hooked up correctly as positive ground.
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1931 5-Window Coupe # 1,406 of 28,379

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#368532 - 05/16/16 01:57 PM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: CGM_31567]
Junkyard Dog Offline




Registered: 11/23/01
Posts: 28629
Loc: Eagle Point, Oregon
Quote:
Upon turning the battery around thereby hooking it up negative to ground the ammeter shows charging.



Is that with the car running? If so, since all Chevrolets are negative ground and not positive ground, reverse the wires on the back of the amp meter.

The amp meter should show a slight discharge when the ignition is on and the car is not running. When the car is running down the road the amp meter should show a charge.


Quote:
SO my understanding is that it is hooked up correctly as positive ground.


Are you talking about the battery or the amp meter? All Chevrolets are negative ground so the battery is hooked up correctly if it is negative ground.

laugh wink beer2

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The Mangy Old Mutt

"If It's Not Junk.....It's Not Treasure!"

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#368540 - 05/16/16 04:01 PM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: Junkyard Dog]
CGM_31567 Offline
Grease Monkey

Registered: 04/27/16
Posts: 29
Loc: DFW Metroplex, Texas
Junkyard Dog,

First, thanks for the quick response.

No, we have not actually started the car and run it yet. It sat for about two years since it last ran, just got a new battery and got the starter to turn over this weekend and now we are going to drain all the old gas. Need to pull the carburetor and clean it up and rebuild the fuel pump before firing it up.

But, it has had a healthy dose of Marvel Oil and everything that should move seems to move just fine so once those tasks are complete we will try running it.

Maybe I'm getting ahead of myself, maybe not. I never even thought of reversing the wires on the amp meter.
^To that point, is there a check list or something of things I ought to be doing and in what order?

Thanks
_________________________
1931 5-Window Coupe # 1,406 of 28,379

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#368575 - 05/17/16 12:13 AM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: CGM_31567]
Junkyard Dog Offline




Registered: 11/23/01
Posts: 28629
Loc: Eagle Point, Oregon
With your battery hooked up to negative ground as it should be, reverse the wires on the back of the amp meter and it should read correctly.

laugh wink beer2
_________________________
The Mangy Old Mutt

"If It's Not Junk.....It's Not Treasure!"

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#368612 - 05/17/16 01:57 PM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: CGM_31567]
Chip Offline

1500

Registered: 02/27/06
Posts: 1801
Loc: Asheville, NC
You asked about a checklist for starting a long-idled old Chevy. Here's one that I posted late last year:

http://vccachat.org/ubbthreads.php/topics/357085/Starting_a_long-idled_old_Chev#Post357085

Hope that helps.

All the Best, Chip
_________________________
"It's wise to choose a SIX"

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#368726 - 05/19/16 01:50 PM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: Junkyard Dog]
CGM_31567 Offline
Grease Monkey

Registered: 04/27/16
Posts: 29
Loc: DFW Metroplex, Texas
Originally Posted By: Junkyard Dog
With your battery hooked up to negative ground as it should be, reverse the wires on the back of the amp meter and it should read correctly.

laugh wink beer2


Before I get there, when the car last ran, the battery was hooked up positive to ground (negative to starter) and everything worked just fine.

Now, I know since it last ran that the starter was rebuilt and the battery was just replaced this month.

Will hooking it up negative to ground, as it should be, cause the starter to turn the opposite direction? I would assume so but I don't know.

Given that information, is it possible that the polarity got switched when the starter was rebuilt? How would I know?


I appreciate the help! I don't know much about this stuff but I'm eager to learn! idea
_________________________
1931 5-Window Coupe # 1,406 of 28,379

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#368727 - 05/19/16 01:52 PM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: Chip]
CGM_31567 Offline
Grease Monkey

Registered: 04/27/16
Posts: 29
Loc: DFW Metroplex, Texas
Originally Posted By: Chip
You asked about a checklist for starting a long-idled old Chevy. Here's one that I posted late last year:

http://vccachat.org/ubbthreads.php/topics/357085/Starting_a_long-idled_old_Chev#Post357085

Hope that helps.

All the Best, Chip


Thanks Chip this helps immensely, my granddad has gone through most of this stuff but I want to follow up everything myself (as much for the learning as the ensuring everything is right).

The car has been in the family for years and it is now coming to me and I'd like to make use of it!
_________________________
1931 5-Window Coupe # 1,406 of 28,379

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#368749 - 05/19/16 07:50 PM Re: ALL CHEVS ARE NEGATIVE GROUND [Re: CGM_31567]
Chip Offline

1500

Registered: 02/27/06
Posts: 1801
Loc: Asheville, NC
That's great! Good luck with it and enjoy your car.

All the Best, Chip
_________________________
"It's wise to choose a SIX"

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