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Alternator overcharging - Camry Toyota Cars & Trucks

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Rebuild or replace altinator.

Posted on Nov 23, 2013

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My car is overcharging what could it be to caves it to overcharged,i am a disable veteran,need help?


Sounds like a faulty regulator rectifier on the alternator borrow a compatible alternator to test the charging system
It usually is cheaper to replace the whole alternator than have them repaired

Mar 24, 2016 | 2002 Cadillac Deville

1 Answer

07 Milan overcharging battery. Replaced alternator. Still overcharging battery. Original alternator bench tested good. What would cause this.


i would say pcm.these. are notorious for getting spiked from ignition sys.have ya had any perfomance problems in the past?

Oct 21, 2014 | 2007 Mercury Milan V6 AWD Sedan

1 Answer

1996 toyota corolla, battery & alternator


If the battery has been overcharged then the cells will be damaged . Have a load test done on the battery to confirm failure and if so then get a new battery.. have the alternator checked at the same time because there is a possibility that the regulator in the alternator has been also damaged allowing over charging of the battery. By having incorrectly connected the jumper leads then you may have also damaged the cpu unit of the engine management box. Best have an autro electrician look at it .

Jun 26, 2013 | Cars & Trucks

1 Answer

Overcharging alternator?


yes it is possible

Jun 20, 2017 | Cars & Trucks

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Charging system lights come on in my Chrysler 300 3.5l. Went to mechanic paid $129 for diagnostics. Mechanic told me the alternator was overcharging. Went and bought a new alternator replaced it myself and...


That is a tough one. Alternators do not overcharge because the alternator is bad. They overcharge because the alternator CONTROLS are having problems. The charging system in your 2005 Chrysler 300 is controlled by the Powertrain Control Module (PCM) Your vehicle needs to be diagnosed by someone who understands how this system works.

Sorry about the $129....I would raise a BIG fuss about that if they told you the alternator needed to be replaced. Apparently, they do not understand how your system works. (It is very difficult to give a correct diagnosis if you do not know how the system works in the first place.)

Jun 15, 2012 | 2005 Chrysler 300

1 Answer

Put a new alernater an still over charging


Over charging could be the result of several things including:
    Faulty Voltage Regulator
  1. A car's battery will overcharge if the voltage regulator isn't working correctly. A voltage regulator is usually part of the alternator, and is used to keep a steady flow of voltage to the battery. If the voltage regulator is defective, it will send either too little or too much charge to the battery. If it sends too much, the car battery will overcharge. The voltage regulator is easily replaceable at an easily affordable price, sometimes for as little as twenty dollars, as of 2009.
  2. Faulty Alternator
  3. Sometimes the alternator itself can be at fault. The alternator is the device that converts the mechanical power of the engine into electrical power to charge the battery. When an alternator breaks, it usually stops creating electricity for the battery, which will then eventually die. However, if the wrong alternator is placed in the car, or if the alternator is running at the wrong pace, it will create too much energy for the car battery, causing it to overcharge. The alternator is another easily replaced part.
  4. Incorrect Charger Use
  5. If a battery charger is used to charge your battery outside of your car, improper use of the charger can result in overcharging. If a battery is placed on the charger too long, it can result in overcharging, and a significant decrease in your battery's lifespan and efficiency. This is why it is important to read about your specific battery and understand how long it needs to charge to be effective. Too much charge will lead to problems.
  6. Faulty Battery Chargers
  7. Sometimes chargers can be faulty. Their settings may be wired incorrectly, or the charges labeled incorrectly. As a result, your battery may be getting overcharged, even if you are carefully monitoring your charging. This is a problem that is hard to avoid, as manufacturing mistakes can happen anywhere, anytime without warning. It is a good idea to test your charger regularly to see if it is running correctly.
  8. Heat
  9. Extreme heat in the summer can also have an adverse effect on the car battery. If the battery has been previously overcharged, extreme heat can increase the problems caused by overcharging, and exacerbate any other problems with the battery. This problem can be hard to avoid if you live in a warm climate. The only real way to ensure safety against this problem is to avoid overcharge in the first place.

Feb 27, 2011 | Ford Expedition Cars & Trucks

1 Answer

Battery overcharges and light is on


Never saw a charging system problem cause anyone to fail inspection. But, overcharging will cook the water out of your battery and can damage the computer system if not taken care of. Overcharge can be caused by either a grounded alternator field wire or a bad regulator. Since the condition appeared after replacing the alternator it too is suspect as an internal grounding can also cause that.

Jul 20, 2009 | 2003 Ford Focus

1 Answer

1991 jeep wrangler: alternator overcharging


It sounds as the voltage regulator which is built into the back of the alternator has stuck. Occaisionally this even happens on new ones. Would suggest taking the alternator back as it shoud be under warranty.

Jul 06, 2009 | 1991 Jeep Wrangler

1 Answer

Blown lights and overcharging alternator (2 alternator)


this can be caused by a shorted cell in the battery, has the battery tested? and clean the battery cable's, corrosion can also cause this condition.

Mar 27, 2009 | 2003 Kia Sedona

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