6 volt Alternator

wspiker

wspiker

Senior Member
How can you tell, and test, if a 6 volt alternator is set-up for positive or negative ground? Or does it make any difference?
 
It makes a differance. The diodes are installed differantly according to polarity. I'm not sure if you touch an ohm meter or diode tester from the battery wire of the alternator to the case or ground wire of the alternator it will show the polarity. It should block the meter in one dirrection and show ohms when you swap the leads. Do NOT do this with the alternator connected to the battery. G.M.
 
Hook up a light bulb between the batt wire and the alt batt terminal --if it lights the polarity is the other way -if it lights both ways there is a good chance the alternator has a bad diode.
 
Go to alternatorparts.com & they explain just about everything you need to know about alternators.
Gary.
 
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