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positive ground cars


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#1 mrspeedyt

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Posted 29 October 2010 - 03:52 PM

what american cars were positive ground ... and what years?:confused: my '41 de soto and '40 la salle is positive ground. the '23 buick is negative.
'23 buick (23-4-35), '52 buick and a few brand x's ('26 db sedan being one) Posted using HAL2000.

#2 De Soto Frank

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Posted 29 October 2010 - 04:25 PM

Prior to the 12-volt changeover in '53-'56, the majority of American vehicles were Positive-Ground.

Major exceptions were:

Buick, Chevy, Olds, Pontiac.


MoPar, Ford/Merc/Lincoln, Caddy & La Salle, GMC, Packard, Nash, Hudson, Pierce, Studebaker were all positive-ground.
Frank McMullen
1928 Ford 49-A Special Coupe
1930 Chevrolet Special Sedan
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1948 & '50 Chrysler NY'ers
1941, 1954, 1955-first Chevy trucks
1961 Rambler American Convertible :D
1965 Ford F-100 long-bed pick-up
1982 Honda Silverwing GL-500 Interstate :cool:

Dearly Departed:
1955 De Soto Fireflite S-21 sedan
1960 Chrysler Windsor PC-1 sedan
1961 Plymouth Belvedere sedan

#3 W_Higgins

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Posted 29 October 2010 - 04:47 PM

Model T's were negative, but Model A's where positive, in one of those rare instances where Ford actually changed their standard for something.

#4 Jim_Edwards

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Posted 29 October 2010 - 06:15 PM

Model T's were negative, but Model A's where positive, in one of those rare instances where Ford actually changed their standard for something.


And all Fords through 1948 remained on the positive ground concept. The story is that Henry thought that electron flow not current flow should be the standard. I suspect his friendship with Thomas Edison may have had a lot to do with that.
OCA, LCOC, AACA
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1962 Oldsmobile Starfire (2)
1976 Lincoln Mark IV (2)
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1995 Ford E-150 custom high top
2003 Lincoln Town Car

#5 Skyking

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Posted 29 October 2010 - 07:00 PM

Metropolitans were pos. ground, although, most of us changed them to neg..... 2 of mine are still positive ground.
Bob
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#6 mrspeedyt

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Posted 30 October 2010 - 03:26 AM

any advantage to positive ground?
'23 buick (23-4-35), '52 buick and a few brand x's ('26 db sedan being one) Posted using HAL2000.

#7 Silverghost

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Posted 30 October 2010 - 03:38 AM

Brittish cars were + positive ground for decades into the 1960s.

On a + positive ground car does the spark not jump in the opposite direction on the ignition point set and also the spark plugs ?

Why was the change eventully made to - Negative ground ?

Edited by Silverghost, 30 October 2010 - 08:46 PM.

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#8 billybird

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Posted 30 October 2010 - 03:56 AM

At least the Model T ended on a "positive" note.

#9 Skyking

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Posted 30 October 2010 - 01:23 PM

I heard that there was less corrosion on + positive ground cars. I never noticed the difference.
Bob
1962 Buick Invicta Convertible
1954 Metropolitan Convertible
1957 Metropolitan Coupe
1960 Metropolitan Coupe (Gold National Winner) 399 1/2 points out of 400
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2000 Dodge Ram 1500
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#10 dei

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Posted 30 October 2010 - 01:39 PM

My (Dad's) 51 Nash Canadian Statesman is positive ground. My original 52 Ford flathead pickup is positive ground also.
As to rust, the Nash has almost 100,000 miles on it and with only ever having seen one winter of driving in it's life it still wears it's original factory paint so it does not have anywhere rust you would expect on a car with that kind of mileage.

#11 mrspeedyt

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Posted 30 October 2010 - 01:46 PM

any cars world wide that were 12v positive ground? (i know the brits were for the most part)...
'23 buick (23-4-35), '52 buick and a few brand x's ('26 db sedan being one) Posted using HAL2000.

#12 JD in KC

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Posted 30 October 2010 - 03:08 PM

Yes, 1955 Packard and Clippers were 12V Positive Ground.

#13 mrspeedyt

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Posted 07 November 2010 - 09:32 PM

found a good thread on the cadillac/ la salle club message forum 'reason for neg vs pos ground?' they got into the subject a little (actually... a lot...) deeper.

Edited by mrspeedyt, 08 November 2010 - 02:40 AM.

'23 buick (23-4-35), '52 buick and a few brand x's ('26 db sedan being one) Posted using HAL2000.

#14 W_Higgins

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Posted 07 November 2010 - 10:18 PM

How about a link?

#15 mrspeedyt

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Posted 08 November 2010 - 02:35 AM

I haven't yet mastered the art of posting a link. sorry...
'23 buick (23-4-35), '52 buick and a few brand x's ('26 db sedan being one) Posted using HAL2000.

#16 mrspeedyt

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Posted 08 November 2010 - 03:57 AM

http://www.cadillacl...c,109562.0.html hope this works...
'23 buick (23-4-35), '52 buick and a few brand x's ('26 db sedan being one) Posted using HAL2000.

#17 W_Higgins

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Posted 08 November 2010 - 04:01 AM

That works -- you done good.

#18 Skyking

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Posted 08 November 2010 - 04:19 AM

They stated what I had said, less corrosion.........
Bob
1962 Buick Invicta Convertible
1954 Metropolitan Convertible
1957 Metropolitan Coupe
1960 Metropolitan Coupe (Gold National Winner) 399 1/2 points out of 400
2000 Buick Century
2000 Dodge Ram 1500
2015 Chevrolet Equinox

MOCNA/Yankee Mets


When people rob banks they go to prison.
When they rob the taxpayer they get re-elected.

#19 W_Higgins

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Posted 08 November 2010 - 04:26 AM

Three pages and no definitive answer. Here another link that offers lots of theories and no answer:

Model T Ford Forum: Why the Switch to Positive Ground on Modren Fords?

I'd lean toward it being a battle of theories with no merit and it ending in standardization.

#20 mrspeedyt

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Posted 08 November 2010 - 04:29 AM

standardization DOES simplify things.... (at least a little... )
'23 buick (23-4-35), '52 buick and a few brand x's ('26 db sedan being one) Posted using HAL2000.




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