Re: Negative vs Positive ground on 12 volt conversions

Posted by steve on April 13, 2003 at 15:45:35 from (204.246.222.27):

In Reply to: Negative vs Positive ground on 12 volt conversions posted by Dennis on April 13, 2003 at 12:49:19:

all alternators started out as negative ground. now, 20 years later, several guys are making voltage regulators (internal) that are positive ground and some are even 6 volt. These are four the aftermarket guys (tractors and trucks) as all new stuff from the factory has been 12 volt negative ground since about 1965.
You could have a 12 volt alternator with positive ground. DOes it appear the battery holds a charge? You need to put a volt meter on the battery and measure the voltage, then start taractor and see if you get a little more (13.8 volts). What eve you do, do not change the terminals of the battery untill you know if the alternator is + or _ ground.

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