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99 Cadillac Deville, replaced battery, alternator, alternator plug. All connections cleaned. Had charging system checked, all good but battery not charging still showing up on dash along with battery indicator light. Any help would be appreciated 

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Where did you buy the battery?

Check the trouble codes and report them here.  Report all P codes here

Some aftermarket alternators will not work correctly


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Interstate battery. Had it checked after replacing battery and alternator and everything was normal. Cleared codes already so can’t remember what they was but not showing any codes now just showing battery not charging and battery light is on ???  Found this sight after cleared codes

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40 minutes ago, Jsblkram said:

Interstate battery. Had it checked after replacing battery and alternator and everything was normal. Cleared codes already so can’t remember what they was but not showing any codes now just showing battery not charging and battery light is on ???  Found this sight after cleared codes

OPPs, I goofed,.I meant where did you buy the alternator.  We only recommend ac delco, many of the 'lifetime' alternators have a glitch in the regulator that throws a code creating a no charge condition.  

If the message is up and light is on, you should have a code, check again


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Bought at O’Rieleys auto parts and yes it’s a lifetime alt. Did not know this info about glitch. I will check for codes again tomorrow and post what it says. THANK U for the info !!!!

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I am not saying the alternator is bad till you check the codes.  But it is a possibility.  We are looking for a code related to the alternators L terminal,

As additional support see this thread

 

 


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I suspect defective or incompatible alternator also. I once had a bad experience with a lifetime alternator I put on from AutoZone on one of my Eldorados. They just don’t do a good job building those anymore...That one seized up actually tearing up the belts!

AC Delco is probably the way to go here and would be more reasonable through rockauto.com with the 5% discount if you can wait for shipping. 


'09 Cadillac CTS-4 3.6 direct injection, 128 K mi.
'15 Chevy Tahoe LTZ, 5.3i V8, 125 K mi
'70 Firebird Formula 400, Bored+.04, RAIII heads, M21 4spd., in-process restoration!

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Here is a rockauto 5% discount good till 6/2/19

Screenshot_20190516-145647_Email.jpg


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Took ur advice and ordered an AC Delco from rock auto. Thank u for the discount code and all the advice !!! I have had several Cadillac’s thru the years but this is the first I have really worked on myself. It’s challenging but rewarding at same time. Will post results in couple days after receive alternator. Once again THANK U !!!!

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6 minutes ago, Jsblkram said:

Took ur advice and ordered an AC Delco from rock auto. Thank u for the discount code and all the advice !!! I have had several Cadillac’s thru the years but this is the first I have really worked on myself. It’s challenging but rewarding at same time. Will post results in couple days after receive alternator. Once again THANK U !!!!

It will be challenging the first time but it will get easier.  You do know there is an inspection removable door behind the right front wheel right?  It allows easier access.  

I always put a 1/4" piece of plywood in front of the radiator to protect it from getting damaged by accident


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Did you replace the pigtail to the alternator? I know you said you replaced a plug.

ACDELCO PT2297

I have run into this enough times.

Not the big cable but the wide plug. There should still be a repair harness for that.

They are common to failing near the plug to the alternator itself.

Also ohm the main cable from the battery to the alternator. I have had one fail inside the cable.

Nothing is worse than replacing a alternator only to find it was that pigtail. Has happened to me


GM FAN FOREVER

Nice, clean, luxury= fine automobile

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1 minute ago, rockfangd said:

Did you replace the pigtail to the alternator?

I have run into this enough times.

Not the big cable but the wide plug. There should still be a repair harness for that.

They are common to failing near the plug to the alternator itself.

Nothing is worse than replacing a alternator only to find it was that pigtail. Has happened to me

I may be mistaken but in his first post he stated that he replaced the plug.


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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1 minute ago, BodybyFisher said:

I may be mistaken but in his first post he stated that he replaced the plug.

Updated 


GM FAN FOREVER

Nice, clean, luxury= fine automobile

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9 minutes ago, Jsblkram said:

Yes replaced pigtail and about 3” of wire

You never mentioned if you had codes, what did you find?  I dont like parts replacing.  Please check codes


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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1 hour ago, Jsblkram said:

Only code I’m getting  is P0603

It seems like you should be getting a code with battery not charging and the batt light on the dash


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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1 hour ago, BodybyFisher said:

It seems like you should be getting a code with battery not charging and the batt light on the dash

Yes battery light is on and battery not charging showing on display. When checking codes with these on all I get is P0603

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2 minutes ago, Jsblkram said:

Yes battery light is on and battery not charging showing on display. When checking codes with these on all I get is P0603

I trust the diagnostic system.  Usually when you get a message there is an associated code.  How are you checking codes?, through the dash?, or with a reader?


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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55 minutes ago, BodybyFisher said:

I trust the diagnostic system.  Usually when you get a message there is an associated code.  How are you checking codes?, through the dash?, or with a reader?

Thru the dash. I do not have a reader yet

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4 hours ago, Jsblkram said:

Thru the dash. I do not have a reader yet

Ok, I would have liked to see a code.  It could be that the alternator is ok in terms of the glitch we speak of above but it has a problem like a blown diode or stuck brushes.  Either way, it must be eliminated as a cause.


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Fantastic !!!!!!!

Replaced alternator with the AC Delco from RockAuto. Battery is charging just fine. Took some time but with the help from u guys it is now back on the road. Many, many thanks for the info to help me figure this out. Thank u !!!!!!!!

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I will definitely be checking on this website to keep up with anything going on and help out if I can ???? Said before that I have owned many caddy’s but this is first one I’ve actually worked on. It’s an experience!!!!! Thanks again !!!!!

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