From: michael.trew@att.net   
      
   On 5/8/2023 23:58, Ivan Vegvary wrote:   
   > 1948 Pontiac, 12V battery, one wire alternator (was working when   
   > parked 12 years ago). No amperage reading even at 2000 rpm.  Battery   
   > voltage 12.6V.  Battery voltage with car running 13.8V, however amp   
   > meter only reads 0 or negative with headlights on.  Placed an after   
   > market ammeter between the alternator and the battery.  Same reading   
   > as ammeter in the dash. How could this be?  Alternator supplies   
   > voltage but no current. After idle for 12 years maybe residual   
   > magnetism is gone.  Needs to be excited.  Can't find a YouTube that   
   > shows me which terminals to zap. All help is appreciated.  I can   
   > certainly buy a new unit, but possibly have other problems.   
   >   
   > Thank you   
      
   That's a tough one... if it's been sitting for 12 years, you've got to   
   start with the basics.  Have you cleaned all of the grounds?  Is the   
   terminal for the wire on the alternator clean?  In 1948, it would have   
   been a 6 volt positive ground system.  I'm assuming that someone has   
   since converted the car to 12 volt negative ground.   
      
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