Alternator not charging

212,000 MILES • 5.2L • V8 • 4WD • AUTOMATIC
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LEDANIEL
  • MEMBER
  • 1 POST
New battery new alternator not charging.
Oct 27, 2019 at 12:22 PM
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CARADIODOC
  • ✓Experienced Mechanic
  • 34,408 POSTS
That's not much to go on. Start by measuring the three voltages on the back of the alternator. First measure the voltage on the large output wire, with the engine off. Next, measure it again with the engine running. Measure the voltages on the two smaller terminals, but the engine must be running for those to be valid. Let me know what you find.
Oct 28, 2019 at 9:12 AM
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