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Wally Posted on Jul 20, 2018
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Why does a altintor overcharge what is the correct voltage the altinator must supply to battery

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Morris Lindsey

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  • Cars & Trucks Expert 219 Answers
  • Posted on Jul 20, 2018
Morris Lindsey
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An alternator starts with 14 volts then drops back as the battery charges up. You may have a bad regulator in the alternator.

Robert Wood

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  • Cars & Trucks Master 6,137 Answers
  • Posted on Jul 20, 2018
Robert Wood
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A sulfated battery or a dead cell can also cause overcharging .

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Anonymous

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SOURCE: need wiring diagram for a

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Mike 11_99

Michael Smith

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SOURCE: I have had 4 alternator and four new battery go dead the voltage reg on 3 of the altinators have tested bad changed battery conectors fuses and checked all the wires to and from altinator and battery

Look for a loose output wire and connection. If the connection is loose dnd making and braking contact, it will blow the alternator. Also check the alternator ground, making sure it is not making and braking contact. The ground is the attachment to the engine bracket. You may have to add a large black wire from the alternator to the engine frame.

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1helpful
1answer

Why does a altintor overcharge

not info generic answer possible bad rectifier or if older voltage regulator
0helpful
1answer

I have replaced the altinator and battery in my '99 Maxima. The altinator is still not charging the battery.

Is there B+ voltage at the heavier wire on the back of the alternator ? . There should be B+ voltage at two more wire's connected to the alternator . What's the charge gauge showing ?
0helpful
1answer

Jawa 90 roadster motorcycle charging panel with battery fitted

diodes do not regulate charge
simply put diodes are one way valves for electricity and are used to rectify alternating current (AC) to direct current(DC)
you use a voltage regulator after a rectifier pack to control the voltage from an alternator of maintain a max voltage of 14.5 volts dc
take it to an accredited bike electrician
0helpful
1answer

Alternator overcharging battery

It sounds like the regulator in the altinator has gone bad
auto zone can check this for you at no charge.
3helpful
1answer

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.
0helpful
3answers

2003mazda protege 2.0 lx overcharging....i changed my alt because of overcharging of 15.16 volts..still the same .amperage at 2000rpm is ok between 55 and 75 amps.could the pcm be affecting regulated...

Replace the battery.its the cells in the battery causing the altinator to over charge due to a short cucuit in the battery.The altinator has a regulator built inside.So ypur battery is at fault.
0helpful
2answers

I just recently replaced my altinator and battery and everytime i try to start it its dead what are some possible problems?

possible problems are endless, could be the voltage regulator, could just be some sort of drain in the electrical system ie a dome light that is burnt out but maybe the switch is in the on position. when you jump it it starts up? Does it click when you try and start it? It could be the starter or starter solenoid and not a power issue. hope this helps
0helpful
1answer

1991 Dodge 4x4 truck altinator will not charge, new altinator, all fuses are good and serkets. Altinator will not charge.

Change voltage regulator. Does the battery take a charge from a charger? If not, replace battery. If it does, then regulator is faulty. If still nothing, return alternator to place of purchase, and have it checked.
1helpful
1answer

Check gauges light is on and battery is overcharging

the altinator is the only thing that can cause this battory cant put out that kind of voltage the altinator has a built in part on most called a regulator that drops it down some have an external regulater even the computer cant make it produce that kind of voltage the most likely problem would be alt or wiring to the alt can get bad ones from time to time
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