Alternator not charging

Tiny
LEDANIEL
  • MEMBER
  • 1995 JEEP GRAND CHEROKEE
  • 5.2L
  • V8
  • 4WD
  • AUTOMATIC
  • 212,000 MILES
New battery new alternator not charging.
Sunday, October 27th, 2019 AT 7:22 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,873 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.
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Monday, October 28th, 2019 AT 4:12 PM

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