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Alternator wiring diagram - batter not charging?

Tiny
MAX 34
  • MEMBER
  • 1 POST
  • 1999 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 161,000 MILES
I just put a brand new alternator on and it's saying it's not charging What could be the problem
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Tuesday, February 12th, 2019 AT 2:01 PM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
Why did you replace the generator? Is the battery more than two years old?
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Tuesday, February 12th, 2019 AT 2:01 PM (Merged)
Tiny
JSANDERS21
  • MEMBER
  • 2 POSTS
  • 1999 CADILLAC DEVILLE
  • 80,000 MILES
Im having problems with my service charging system and my battery keeps dieing
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Tuesday, February 12th, 2019 AT 2:01 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Have you had your alternator and battery tested yet?
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Tuesday, February 12th, 2019 AT 2:01 PM (Merged)
Tiny
JSANDERS21
  • MEMBER
  • 2 POSTS
Yes and they told me that they both were good
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Tuesday, February 12th, 2019 AT 2:01 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
So is the service charging system light always on?
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Tuesday, February 12th, 2019 AT 2:01 PM (Merged)
Tiny
CARGUY13
  • MEMBER
  • 1 POST
  • 1997 CADILLAC DEVILLE
  • 4.6L
  • V8
  • FWD
  • AUTOMATIC
  • 100,000 MILES
Alt will not charge when first started but in 5 to 10 mins. Works fine 14.3v and works good all day. Battery test good. But battery needs replacing about very 6 months car not driving far or much. Alt test good when working.
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Tuesday, February 12th, 2019 AT 2:01 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check battery for condition including load test then make sure terminals are clean as well at engine and body like the grounds. Check fusible link to alternator it may only have a few strands connected causing your problem.
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Tuesday, February 12th, 2019 AT 2:01 PM (Merged)
Tiny
MS. PAMELA H.G. GUNCHICK
  • MEMBER
  • 1 POST
  • 1998 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 64,000 MILES
Hi
Please reply with any and all answers and or advice.
I bought a used 1998 Cadillac sedan deville with 62000 miles on it
The original one previous owner had kept all original records etc. She took it to the dealer all the time.
Now I come along and buy it.
She replaced the battery in august 2008 I bought the car in October 2008 now here in may 2009 I put only 2000 miles on it in 7 months. Now I get the ""battery not charging light" on the battery cost jean the original owner $150.00 dollars and it is less than 1 year old?
What does this light refer to?
Please reply
Thanks so much!
God bless
Sincerely
Pam
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Tuesday, February 12th, 2019 AT 2:01 PM (Merged)
Tiny
THIS IS MIKE
  • MECHANIC
  • 686 POSTS
The "BATTERY NOT CHARGING LIGHT" refers to a problem with the charging system. It could mean that the alternator is not charging properly. You should have both the battery and the alternator tested to make sure the alternator is putting out the proper charge and the battery is able to receive and hold a full charge. Also make sure the battery cables are tight.
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Tuesday, February 12th, 2019 AT 2:01 PM (Merged)
Tiny
MICHAEL0001
  • MEMBER
  • 2 POSTS
  • 1991 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 10,800 MILES
We have replaced a battery, alternator. Gave it a jump start and ran it for a bit. To find the air cond. Running and unable to shut off. Then to dissconnect the jumper cables, shut off the car, it goes back dead, nothing. Seond time of jump start, now there is no clicks of the starter.
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Tuesday, February 12th, 2019 AT 2:01 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Check battery cables POS to starter and NEG to block.
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Tuesday, February 12th, 2019 AT 2:01 PM (Merged)
Tiny
JACKPELT
  • MEMBER
  • 1 POST
  • 1997 CADILLAC DEVILLE
  • 4.5L
  • V8
  • RWD
  • AUTOMATIC
  • 189,000 MILES
Car does not charge battery have had alternator replaced still have problem dash shows system not charging drains battery and dies some times message goes off car runs ok for a little while. Have had car checked at a mechanic could not find problem. Dont trust car any more so dont drive it. Any suggestions?
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Tuesday, February 12th, 2019 AT 2:01 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It can be a connection proble from pcm and or alternator so would need to be checked for that.
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Tuesday, February 12th, 2019 AT 2:02 PM (Merged)
Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
  • 1997 CADILLAC DEVILLE
  • 145,000 MILES
Battery not charging
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Tuesday, February 12th, 2019 AT 2:02 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Have the alternator checked as it may have failed

Roy
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Tuesday, February 12th, 2019 AT 2:02 PM (Merged)
Tiny
CHRISTIE HOWE
  • MEMBER
  • 1 POST
  • 1999 CADILLAC DEVILLE
  • 100,000 MILES
Replace alternator help.
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Tuesday, February 12th, 2019 AT 2:02 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
See pictures. You do not need to remove radiator like instructions say. Alternator comes out through bottom, you may have to take a shield off however.
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Tuesday, February 12th, 2019 AT 2:02 PM (Merged)
Tiny
PAPA2593
  • MEMBER
  • 1 POST
  • 1999 CADILLAC DEVILLE
  • 4.6L
  • V8
  • FWD
  • AUTOMATIC
  • 114,000 MILES
Old alternator died and replaced it with a new one but now it does not charge. Traced it down to no voltage going to the regulator
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Tuesday, February 12th, 2019 AT 2:03 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
So, apparently the alternator wasn't the problem.

That power is supplied by the PCM but my diagrams don't show where the PCM gets it from. I would use a test light and test every fuse with the key on.

https://www.2carpros.com/images/external/81022107.jpg.gif
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Tuesday, February 12th, 2019 AT 2:03 PM (Merged)

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