Posted by John T on January 26, 2010 at 08:29:29 from (71.52.8.83):
In Reply to: Positive Ground posted by mss3020 on January 26, 2010 at 07:08:34:
This has been discussed numerous times on here. I read some tech literature yearsssssss ago that Ford and Chrysler in the early auto years were of the opinion there was less corrosion between frame members IF the battery was positive grounded. GM did NOT necessarily share that. However, later on the industry became standardized at Neg ground. Many early 6 volt tractors were Pos ground but switched to Neg ground when they went to 12 volts. HOWEVER ALLLLLLLL Two Cylinder Deeres were Pos ground regardless if 6 or 12 volt.
At our Naval facility years ago we used cathodic protection which passed small DC current through our buried metallic pipes to reduce corrosion.
Incandescent lamps or other resistive type loads can operate at EITHER Pos or Neg Ground while polarity sensitive elec ignition modules and alternators and LED lights are indeed Polarity sensitive.
Typical DC tractor starting motors operate and still turn the same direction REGARDLESS of Polarity
A typical tractor DC Genny can charge at EITHER Polarity and work witihin the charging system correctly once Polarized
I hope the other fine gents can add to this, nuff said for now, hope this helps
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