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Alternator not kicking out voltage to battery

Tiny
QUANTAE
  • MEMBER
  • 1992 CHEVROLET CAPRICE
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
I have a new battery, and new alternator, but the battery keeps draining. I was told that the alternator is not kicking out any voltage to the battery. Also, windows do not roll up or down. I am thinking I have some electrical problems some where but do not know were to start.
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Sunday, December 31st, 2017 AT 6:20 AM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

Can you check the voltage at the battery with the engine running?

Roy
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Sunday, December 31st, 2017 AT 6:35 AM
Tiny
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  • MEMBER
  • 3 POSTS
Yes I can, but when I am getting it checked they say the battery not charging. Battery will drain after two or three days.
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Sunday, December 31st, 2017 AT 8:34 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, can you tell me the voltage reading at the battery engine running after you charge it? Look for 14 to 14.5 volts. If you do not, check the heavy wire at the back of the alternator for battery voltage.

Roy
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Sunday, December 31st, 2017 AT 8:37 AM
Tiny
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  • MEMBER
  • 3 POSTS
When I check the voltage at the battery it has no voltage, but when I check it at the alternator it does have voltage.
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Sunday, December 31st, 2017 AT 8:42 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
What voltage? Can you give me the readings?

Roy
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Sunday, December 31st, 2017 AT 8:47 AM

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