Question about 2004 Dodge Ram

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Charging system My charge light has been coming on followed by a decrease in speed and eventually dying out. Had the alternator removed and checked and it is fine. Was told that i may need to change the voltage regulator. Dealer says it is now part of the $712.00 PCM.  Is that the only way to fix this thing?

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You can also try to instal a external regulator, from the 70,s or 80's but that will be like a good mikey mouse job,
if you can't affort to pay that money now, the only way is visiting auto electrical shops and ask for an external regulator, if they don't want to do it i will tell you how to do it, but if you want it original then have the computer replaced, but before replacing teh computer make sure you are getting igniton power to alternator at one of the small thing wires,
i will aprecviate your ranking and good luck

Posted on Jun 23, 2008

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Battery warning light is on, on dashboard panel.


hi the problem is the charging circuit is not working ,sometimes its worth a look under the bonnet to check if the alternator belt is still on and in one peice if it is slipping badly it wont turn the alternater at the correct speed to charge the battery .
if you can check the voltage of the battery when the engine is off should be about 12.5-13.5 volts
start the engine and check again should be about the same if it is dropping then I would suspect
the alternator is faulty
If the only symptom is the light coming on and there are no other signs of a problem like engine dying or lights going dim then you could have one phase of your alternator down that is putting the light on this can go on for a long time like this without any other problem but will eventually fail so
needs to be checked out

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You may have an alternator that is getting ready to go out. Have you noticed a whinning sound that increases / decreases with engine speed? A diode going out in your alternator will sometimes produce a whine and will reduce the voltage produced, eventually not keeping your battery charged.

Take car to an auto parts store for alternator check. Many stores will perform this test for free.

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1 Answer

My alternator went out so i replaced and its working fine but my battery still keeps dying its not takin the charge from the alternator and when i charge the battery it will start and drive some distance...


Sounds to me like your alternator is still defective. You don't need a good battery to run a car. Start car and remove (carefully...do not allow it to touch any metal), negative battery cable. If car dies it is the alternator. If it runs then the battery is bad. Hope this helps.

If I have helped you resolve your problem, please
consider giving me a good rating. Thank you.

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Alternator whine


I had a buddy that had the same problem with his Altima for about a year and I kept telling him that his alternator was going to die and he wouldn't believe me.  I was suprised it took so long, but it eventually gave up the ghost and I replaced it for him.  Fixed the whine and now we can't here him coming before we see him any more.  The only way you are going to get rid of it is to change it out.  This is the warning that it is on it's way out.  Hope this helps.  Thanks for an honest rating and for using FixYa.

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