Positive Ground?
#167684
12/14/08 09:43 PM
12/14/08 09:43 PM
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Anonymous
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I did a search but didn't find anything that answered the following question:
What years, if any, did D/D/C/P vehicles have electrical systems with a positive ground?
Thanks in advance for the help, guys. (I have a 12 pack wager with a buddy!)
~Matt
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Re: Positive Ground?
[Re: MoparforLife]
#167689
12/14/08 09:59 PM
12/14/08 09:59 PM
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Hey Guys, Thanks a LOT for the quick replies. (my buddy owes ME a 12 pack!) 
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Re: Positive Ground?
[Re: Scott Carl]
#167690
12/14/08 10:04 PM
12/14/08 10:04 PM
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Joined: Jan 2003
Posts: 4,150
lewiston, ID
cornucopia
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Joined: Jan 2003
Posts: 4,150
lewiston, ID
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Quote:
Without researching I'm guessing, but I don't believe any Mopar or other American made car had positive ground. Thinking it was strictly European. 
Edit: Uh oh, I googled. I may be wrong
international trucks in 1951/52 had a positive ground with, as I recal, a 6 or 9 volt system. we had one as a trash truck when I worked in the small engine shop back in the 80s...we would junp it with a 12 volt battery and man would it turn over QUICK! 
the 1967 'White' backhoe we had at my previous cemetery was a positive ground also...
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Re: Positive Ground?
#167691
12/15/08 12:01 AM
12/15/08 12:01 AM
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Joined: Sep 2003
Posts: 1,592
Mansfield, TEXAS
JOES4FORTY
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pro stock
Joined: Sep 2003
Posts: 1,592
Mansfield, TEXAS
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Those old American LaFrance Fire Engines had positive ground on them. Dangerous to jump start and charge with a charger if you didn't know that. 
The GTS Registry!MOPARTS MEMBER IN PRINT 1969 Dart GTS LS23P9B (First day of production car money pit)
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Re: Positive Ground?
[Re: Pool Fixer]
#167694
12/15/08 01:34 AM
12/15/08 01:34 AM
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Anonymous
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Many old 6V cars were pos. ground. Back when "we" used generators, many regulators were sold as pos or neg. ground. The only real difference in regulators is the contact structure--to prevent arcing. Some replacement aftermarket regulators had contacts that could be used either way
When you replaced a generator, you "flashed" it to magnitise it correctly for whatever polarity. I believe some weird trucks (dunnooo, White?) were 12V pos ground. In the two-way radio market, some older radios were built for either pos. or neg, and you can still buy a pos to neg inverter/ converter.
It's too darn bad that when the car makers went 12, they didn't keep going to at least 24V. Smaller wire--less amperage--solves a LOT of wiring / voltage drop problems.
Many log trucks/ highway tractors used to use a 12/24V solenoid--24V for startup. They are a wiring nightmare.
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Re: Positive Ground?
#167695
12/15/08 02:11 AM
12/15/08 02:11 AM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
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Too Many Posts
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Posts: 21,345
Marysville, O-H-I-O
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just about every 6V car I've seen used a positive ground.
I also have personal experience that Packard used a 12V positive ground from somewhere in the early 50s to 1955. they made the switch to negative ground in 1956.
I had to be VERY AWARE of what I was doing, when hooking the battery charger up from car to car, when you have 1955 Packard carribean convertible sitting next to a 1956 Packard carribean convertible, and they look damn near identical!
**Photobucket sucks**
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