[AT] Tractor batteries

[Spencer Yost]

I always thought it was coincidental:   The adoption of 12V happened roughly the same time negative ground was being adopted; so many manufacturers did both at the same time.

Like Steve, I heard corrosion of ground points was the reason for the grounding switch but I have no idea if that is correct.

Spencer

Sent from my iPhone

> On Jan 17, 2014, at 0:06, Greg Hass <ghass at m3isp.com> wrote:
> 
> Was looking at some old tractor stuff online and was reminded of 
> something I  have know for years but have never, at least in my failing 
> memory, seen a plausible explanation as to why most 6 volt tractors have 
> positive grounds whereas 12 volt tractors have negative ground.  At 
> first I thought it could be because 6 volts had generators, however, our 
> first 12 volt tractors had generators and later models had alternators 
> so that doesn't seem to be the reason. Any and all answers would be great.
>      Greg Hass
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