Question about 2004 Pontiac Grand Prix

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Car computer posts " Charging system Failure "

So far in trying to determine what the problem may be I have replaced it with 2 different used alternators problem still exists , tried 2 used batteries problem still exists and went out and purchased a new battery still problems. Sometimes when I shut off my car and go to restart it will not...UNLESS I disconnect the negative post wait to hear a clicking sound and place the cable back on the post ...turn the key and it starts. What can the problem be ?

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  • Ron J.Meade Dec 22, 2014

    No , when an attempt to start the car nothing happens...no turning over. I really don't need boost the car just remove the negative post and replace then turn key and it starts.

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Sound like your starter solenoid is sticking,. you may need to pull the starter. you can take it to orilley, or auto zone will test the starter for you. for free. good luck.

Posted on Nov 26, 2014

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Any high power in the car will have a 12V relay such as alternators and battery. The clicking sound is your alternator relay, it's a eletical/mechanical device for switching. Check out your relay in the fuse box, most likely it's defective in stuck ON position.

Posted on Nov 26, 2014

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Starter Relay or some kind of relay would make a clicking sound when you disconnect the battery it disengages if it was stuck closed.

Posted on Nov 26, 2014

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Do you mean doesn't turn over or doesn't fire up. Did you try a boost?

Posted on Nov 26, 2014

Testimonial: "No...when ignition is turned to start it does nothing.I never need boost the car. I simply remove the negative cable and re-attach to the post and then turn the key the car starts."

  • Lion6 Dec 28, 2014

    I meant to ask you to try a boost without removing cables. If that causes it to start then it would also tell us a lot. You could let us know what headlights(on) do when you turn key during start failures. res

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Look for a relay in your fuse box that may be faulty and causing that problem. Starter relay, battery relay, power relay...something along those names. What make year and model car ?

Posted on Nov 26, 2014

Testimonial: "My nephew thought perhaps the same so we switch the fuses around with another and still does the same."

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Sounds like it might be the starter relay might be resetting when you disconnect. Find it and swap with a similiar relay in fuse panel.

Posted on Nov 26, 2014

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If your car is over twenty years old (Resistance is Futile)

Simply: Check your main ground and hot. Be sure contact is worthy. Check resistance of the primary wires. It is a time consuming procedure although very inexpensive task. Patience is paramount. You can solve this hiccup.

PLEASE for you to remember to disconnect the battery before any attempt to follow such instruction as expressed. Also, maybe you should might wish to check the reserve of the battery.

Posted on Nov 26, 2014

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Posted on Jan 02, 2017

GM Elec
  • 1000 Answers

SOURCE: I am trying to use my 2002 Pontiac Montana to boost another car

scouter, You can put the negative cable on an engine bolt or bracket. Be sure you hook up the negative last, we don't want sparks near the battery.
Good luck.
Regards,

Posted on Feb 27, 2009

  • 80 Answers

SOURCE: clicking starter=car not starting

this may be same thing thing as found on volvo 940 you have a large double relay both for fuel pump and allso for starting

Posted on May 04, 2009

jturcotte
  • 8836 Answers

SOURCE: 2001 sunfire put new starter in car would not

Hi, it sounds like the starter solenoid was not wired properly. You have 2 wires at the starter, right? The bigger wire goes to the big top post on the solenoid, right? The smaller wire is called the start wire and it goes to the smaller terminal labeled "S." Is that how you wired it? You also have to be careful when tightening the nuts on the terminals that the start wire terminal does not touch the other terminals and vice versa. Do you have the starter in the car now? Can you take a picture to send me?

Posted on Apr 05, 2011

Goofguyster
  • 379 Answers

SOURCE: 2001 Pontiac grand am gt, battery is new,

replace the negative terminal

Posted on Feb 26, 2012

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Charging System Failure
Refer to Charging System Description and Operation

Electrical Power Management (EPM) Overview
The EPM system is designed to monitor and control the charging system and send diagnostic messages to alert the driver of possible problems with the battery and generator. This EPM system primarily utilizes existing on-board computer capability to maximize the effectiveness of the generator, to manage the load, improve battery state-of-charge (SOC) and life, and minimize the system's impact on fuel economy. The EPM system performs three functions:
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• It takes corrective actions by adjusting the regulated voltage.
• It performs diagnostics and driver notification.
The battery's condition is estimated during key-off and during key-on. During key-off the SOC of the battery is determined by measuring the open-circuit voltage. The SOC is a function of the acid concentration and the internal resistance of the battery, and is estimated by reading the battery open circuit voltage when the battery has been at rest for several hours.
The SOC can be used as a diagnostic tool to tell the customer or the dealer the condition of the battery. Throughout key-on the algorithm continuously estimates SOC based on adjusted net amp hours, battery capacity, initial SOC, and temperature.
While running, the battery's degree of discharge is primarily determined by a battery current sensor, which is integrated to obtain net amp hours.
In addition, the EPM function is designed to perform regulated voltage control (RVC) to improve battery SOC, battery life, and fuel economy. This is accomplished by using knowledge of the battery's SOC and temperature to set the charging voltage to an optimum battery voltage level for recharging without detriment to battery life.
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Charging System Failure
The BCM and the ECM/PCM will send a class 2 message to the IPC for the CHARGING SYSTEM FAILURE message to be displayed. It is commanded ON when a charging system DTC is a current DTC. The message is turned off when the conditions for clearing the DTC have been met.

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DTC B1327
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https://www.motor.com/magazinepdfs/042010_09.pdf

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