EHY DOES MY ALTERNATOR CHARGE SOMETIMES BUT NOT ALL

  • Tiny
  • dhracer6061
  • 1995 Jeep Grand Cherokee
  • 185,000 miles

My alternator charges sometimes but dies out slowly or doesn't work at all. If I spray wd40 it it it seems to work for a bit but doesn't say working

Friday, July 27th, 2012 AT 4:33 AM

4 Answers

  • Tiny
  • dhracer6061
  • Member

I have a volt meter hooked up at all times as the engine temp increases the voltage goes down until I spray wd40 and start it back up

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Friday, July 27th, 2012 AT 5:26 AM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

What is the voltage readings exactly?

Roy

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Friday, July 27th, 2012 AT 10:45 AM
  • Tiny
  • dhracer6061
  • Member

The highest is 14.3 and it gradually goes down until it won't run

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Friday, July 27th, 2012 AT 5:08 PM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

You most likelt have a failed alternator. Remove it and take it to a parts store and have them test it

roy

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Friday, July 27th, 2012 AT 5:21 PM

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