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1978 electrical problem

4K views 2 replies 2 participants last post by  John Beckemeyer 
#1 ·
Altenator produces 12volts. Had it tested and it passed. Electric windows are slow. With head lights on (and they are dim) radio will shut off by its self. And battery is not charging.
Any ideas? I am lost. Is there a voltage regulator on the 78 vettes?
 
#2 ·
how was it checked ?
alt should put out a min 13.6 to charge
 
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