Ford Model T +++ or ---- Ground ???
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Topic author - Posts: 297
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- First Name: Michael
- Last Name: Davis
- * REQUIRED* Type and Year of Model Ts owned: 1923 Center door
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Re: Ford Model T +++ or ---- Ground ???
Originally negative ground.
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Re: Ford Model T +++ or ---- Ground ???
Nice looking Runabout too !
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Re: Ford Model T +++ or ---- Ground ???
Positively... Negative ground.
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Re: Ford Model T +++ or ---- Ground ???
———
Tony Bowker
La Mesa, California
1914 Touring, 1915 Speedster, 1924 Coupe.
La Mesa, California
1914 Touring, 1915 Speedster, 1924 Coupe.
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Re: Ford Model T +++ or ---- Ground ???
A while back I did some research and found the following:
Why a Positive ground?
For early cars with varnished cloth wires would absorb moisture and cause corrosion. It was found that reversing the polarity would actually reduce corrosion.
Why a Negative ground?
After plastic coating of wires was common and the transistor was desired. Electronics industry standardized NPN (Negative-Positive-Negative) transistors.
So Ford Ts were based on the original thought that electrons flow from positive to negative and we should turn off the positive. In reality the electrons flow from negative to positive an evidently that can cause a issue to leave the charge across the ground creating corrosion so Model A went to positive ground. Does anyone know when for switched back?
Enjoy,
Matt
Why a Positive ground?
For early cars with varnished cloth wires would absorb moisture and cause corrosion. It was found that reversing the polarity would actually reduce corrosion.
Why a Negative ground?
After plastic coating of wires was common and the transistor was desired. Electronics industry standardized NPN (Negative-Positive-Negative) transistors.
So Ford Ts were based on the original thought that electrons flow from positive to negative and we should turn off the positive. In reality the electrons flow from negative to positive an evidently that can cause a issue to leave the charge across the ground creating corrosion so Model A went to positive ground. Does anyone know when for switched back?
Enjoy,
Matt
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Topic author - Posts: 297
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Re: Ford Model T +++ or ---- Ground ???
Ford returned to using the negative ground system in 1956 and also 12 volt batteries
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Re: Ford Model T +++ or ---- Ground ???
Unless you are running a diode or modern voltage regulator, the T does not care what ground you are using as long as the meter is hooked up right. The old books said to reverse the leads every so often on non generator cars to even the points wear if running them on battery. Mechanical cutouts don't care what ground is used as long the generator is polarized to that ground.
I know the voices aren't real but damn they have some good ideas!
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
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Re: Ford Model T +++ or ---- Ground ???
Michael
that is a very nice looking car
that is a very nice looking car
Scott Conger
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured