Posted by Janicholson on May 04, 2009 at 11:43:11 from (199.17.6.147):
In Reply to: Re: 12 volt posted by taba on May 04, 2009 at 06:35:27:
If alternator, it is likely 12v neg ground. HHooowww EEVVEERR they make 6 volt alternators, in both ground polarities, and 12v in both polarities. do not connect an alternator to the wrong polarity, it will fry instantly. Use a test light and a charged bqattery to check. Disconnect the alternator from all wires, but have it grounded (Installed). Hook up the battery negative ground. Use a test light between the Battery terminal (big) on the alt, and the ALT wire that should go there (assumes it is connected to the amp meter and the amp meter is good, and the amp meter is connected to the battery side of the starter switch). If it does not light, all is well, neg ground. If it does light, the alt is possibly pos ground, or has burnt/shorted output diode bridge. Take it inb for testing. JimN
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