Question about 2005 GMC Sierra 2500HD 4WD

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I am getting battery not charging indication on my cluster

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  • jameschesnut Jan 01, 2011

    No - I had the alternator checked and it is producing over 14 volts. The GMC dealer told me it was the ECM - Where is the ecm on this vehicle.

    Your answer is incorrect -

  • jameschesnut Jan 01, 2011

    The dealer checked it out - told me the alternator was working perfect. I also have a guage that shows 14 volts charging. Also the batteries were checked and are good. Been driving it all day. Is it the ecm and how do I reslove this

  • jameschesnut Jan 03, 2011

    I was looking for a second opinion - I have been driving the vehicle for the past 24 hours non-stop and it is still running

  • jameschesnut Jan 05, 2011

    Thank you - I will check all of this

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SOUND LIKE FAULTY ALTERNATOR.CHECK ALTERNATOR FUSE.CHECK ALTERNATOR BATTERY FEED WIRE AND VOLTAGE REGULATOR WIRES.CHECK FOR DAMAGE OR SLIPPING DRIVE BELT.TURN OFF RADIO TO KEEP FROM LOCKING IT OUT.WHEN YOU DISCONNECT NEGATIVE BATTERY CABLE.TO REPLACE ALTERNATOR.HAVE ALTERNATOR TESTED AT AUTO PARTS STORE FIRST BEFORE BUYING NEW ONE.

Posted on Jan 03, 2011

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Hello you will need replacement of your alternator.Your battery has approximately 30 minute reservoir.

Posted on Jan 01, 2011

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  • John Jon Jan 01, 2011

    Continued:That means your car will shut off and unfortunately will not restart.No testing involved reason of your battery symbol showing is that your alternator charges your battery! and now your battery light is on for the fact your battery is not charging because your alternator is not working.

  • John Jon Jan 01, 2011

    however your battery light is present because of the simple fact it is not being charge by your alternator their for this motivates your battery indicator no test required this is a fact that this is your problem with your car.your battery will last for approximately 30 minutes before your car will shut off.This is a feature your car is equipped with ounce you see the battery light you have 30 minutes to get your car home or to service garage.

  • John Jon Jan 01, 2011

    Well if you had it to a dealer and they told you it was the ECM why did you post and ask?why did you post your question when you supposedly already new!!!!the answer from the dealer.I have been working at the dealership as a senior CLASS A MECAHNIC for 25 years and this is the first i have seen a battery lite diagnosis as ECM not even close.I do not know what your trying to accomplish here????

  • John Jon Jan 01, 2011

    you say you had the charging system tested it is charging "14 VOLTS it is overcharging that's why your battery light is on your alternator is overcharging your battery that is why your battery light is on your battery is being over charged what is is your battery 12 volts of 14 volts i have seen them charge up to 12.79 the highest 13.20

  • John Jon Jan 03, 2011

    ECM Electronic Control Module has absolutely nothing to do with your battery light if your ECM was malfunctioning your engine would not be running for 24 hours non stop.Again the alternator trips on the battery light when charging is not charging and some times charging from alternator can be intermittent.So if your ECM is the problem 1-you will have a check engine light on other the car will not run this is the hard drive of your vehicle this controls fuel,ignition,timing of the engine.Not only you have clearly contradicted your self you asked quote"I"m getting a battery warning light on in my cluster what dose this mean after i provided a solution you came back when you received the proper solution and said "Wrong" I had the car at the GMC dealer they said it is the Electronic control module so why did you inquire if you already knew?

  • John Jon Jan 03, 2011

    SORRY FORGOT TO MENTION YOU SAID THE DEALER SAID YOUR alternator was fine it is charging 14 volts ALTERNATORS CHARGE AMPRIGE LIKE 65 amp 95amp!Please have your inaccurate facts straight if your able

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1 Answer

1999 Deville 4.6. Not charging. Replaced 2 Alternators and plugs for the alternator. Is there a relay I'm missing?


Is there Battery voltage on the heavier gage wire on the back of the alternator ? Is the charging symbol light lit on the instrument cluster ? No relay invloved in charging system ! Computer controlled .

Charge Indicator Always On ?????????

Charge Indicator Inoperative ??????????

The above are both diagnostic flow charts

Install a scan tool.
Turn ON the ignition, with the engine OFF.
View the IPC Data List Input ALT L TERMINAL on the scan tool.
Does the scan tool display ON?

Your best bet take an have it diagnosed at a qualified repair shop .

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2003 Ford ka what colour is the wire for the alternator warning light on dash cluster


There isn't one ! This vehicle relies on serial data communication . The PCM sends an message on the data bus to the microprocessor inside the instrument cluster . The PCM controls the operation of the charging system warning indicator in the instrument cluster. The PCM is therefore responsible for turning the warning indicator off after the engine is started and illuminating it under fault conditions (when the generator is not generating the correct amount of current with the engine running). The warning indicator will also be illuminated by the PCM at key ON engine OFF, and stall conditions.
Charging System Warning Indicator
The instrument cluster receives the charging system status from the PCM over the SCP or CAN communication network. The PCM controls the charging system and the charging system warning indicator. The PCM is therefore responsible for turning the lamp off once the system is running and illuminating it under fault conditions (including stall conditions).
How to Diagnose Controller Area Network CAN Your best bet would be to take your vehicle to a qualified repair shop .

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Do you think I might have somehow damaged the instrument cluster?


when you replaced the battery the CPU program may have become corrupted
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2004 gmc envoy xuv , battery light stays on , replaced battery and checked alternator charging fine


You checked the charging voltage at the battery with a ? volt meter ? What was the voltage with the vehicle running ? 13.1 to 14.1 volts ?
BATTERY NOT CHARGING The IPC illuminates the battery not charging indicator in the driver information center when the following occurs:
?€¢
The PCM detects that the generator output is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the PCM requesting illumination.


?€¢
The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the body control module (BCM) indicating the system voltage


Charge Indicator Always On
Step
Action
Yes
No

1

Did you perform the Diagnostic System Check for Starting and Charging? yes or no
Go to Step 2 yes
Go to Diagnostic System Check - Engine Electrical no

2

  1. Turn ON the ignition, with the engine OFF.
  2. Observe the Charge indicator on the instrument cluster (IPC)
Does the charge indicator illuminate?
Go to Step 3
Go to Symptoms - Engine Electrical

3

  1. Turn OFF the ignition.
  2. Disconnect the generator connector.
  3. Turn ON the ignition, with the engine OFF.
Does the charge indicator illuminate?
Go to Step 4
Go to Charging System Test

4

Test the charge indicator control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 6
Go to Step 5

5

Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls 4.2L.
Did you compete the replacement?
Go to Step 6
--

6

Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 3

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1 Answer

2006 chevy trailblazer is not charging battery. battery and alt are new


Volts slowly drop to where what quits ,The vehicle stops running ? Is the charge indicator light lit on the instrument cluster /? are any lights lit on the instrument cluster ? The instrument panel cluster (IPC) illuminates the charge indicator and the BATTERY NOT CHARGING message is displayed in the message center when the following occurs:
The engine control module (ECM)/powertrain control module (PCM) detects that the generator output is less than 11 volts or greater than 16 volts. The IPC receives a serial data message from the ECM/PCM requesting illumination.


?€¢
The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a serial data message from the body control module (BCM) indicating the system voltage.


?€¢
The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.


?€¢
The ignition is on, with the engine off

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1 Answer

What does the discharge warning light on a 2005 diesel hilux mean?


The fact that so many lights are on most likely suggests an earth fault on the instrument cluster. To check if the alternator is charging - if you can scrounge a voltmeter place it across the battery terminals with ignition off and nothing turned on. You should see around 13.2volts. (a 12v battery is actually 6 x 2.2v lead acid cells hence 13.2v). Now start up and check again - anything significantly more ie. 14.2v+ should indicate that the alternator is charging OK.
Alternatively start up and let the engine tick over switch the headlights on then blip the throttle - you should see an increase in brightness which indicates that the alternator is charging.
If you have other symtoms such as dim headlights etc they would point to a major earth fault - possibly at the battery terminals but what you describe does initially point to the instrument cluster.
__________________

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1 Answer

My battery light went on, on. My 2003 GMC ENVOY, the message board said "battery not charging" .....I took it to autozone and they said I had a bad alternator which is why it would say battery not...


The charging system on your vehicle is Computer controlled . called ( smart charging system )
BATTERY NOT CHARGING
The IPC illuminates the battery not charging indicator in the driver information center when the following occurs:
• The PCM detects that the generator output is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the PCM requesting illumination.
• The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the body control module (BCM) indicating the system voltage.

Do you know what DTC'S - diagnostic trouble codes are ?
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DTC B1328
DTC P0562
DTC P0563
DTC P0621
DTC P0622
DTC P1633
DTC P1634
DTC P1637
DTC P1638
These codes are all associated to charging system problems .

Battery light lit on the instrument cluster ?


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2 Answers

The altenator is not keeping the charge to the batery....besides the fuse panel in the passager side is there 1 under the hood or another in another location?


Have you changed the alternator. The alternator may not be putting out enough of volts to keep the battery charged, also the alternator could be charging but the battery could have dead cells. What or if any parts have you replaced. Also what does the charge indicator on the gauge cluster indicate and do you have a battery light flashing on the cluster panel.

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Lights are dimming, gauges are zeroing out while i'm driving. Could this be my alternator? Because car has new battery and starter.


If your battery is charge indicator light does not come on and battery is holding charge after a couple days of driving it is unlikely your alternator is faulty.
If the lights are dimming on youe meter cluster only, it could be a bad connector to the meter cluster.
If your head light are dimming it could be a bad battery connection or the alternator.

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