Question about 1991 Plymouth Grand Voyager

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Voltage fluxuations. I've replaced the alternator twice and the battery is new yet the alternator is not charging the battery. As a result the battery voltage goes down until it finally is drained. What am I missing? could the computer be bad? someone told me the computer regulates the voltage.

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Check for open wiring first around the alt. sometimes will tear the insulator and arc off.You can see this at night in the dark.Most regulators are in the alternator.

Posted on Sep 25, 2009

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2 Answers

Alternator charges at 14.4volts, replaced regulator, same result. boils battery.


The max charge voltage is usually around 14.5 volts, so 14.4 is not high.
Its possible the battery has a dead cell and that is causing the acid problem.
You might want to check with the dealer on what the max voltage is for your car.

Oct 08, 2012 | 2001 Hyundai Elantra

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1992 pontaic sunbird GT 3.1L V6 when I turn the ignition key to the position just before crank, everything seems normal for about 3 seconds, battery gauge shows full charge, gauges do their little...


SOUND LIKE DEAD BATTERY.HAVE BATTERY CHECKED AND REPLACED.MAKE SURE ALTERNATOR CHARGING BATTERY.WITH ENGINE IDLING BATTERY VOLTAGE OUTPUT AT BATTERY SHOULD BE 13.5 - 14.5 VOLTS. IF NOT CHECK ALTERNATOR BATTERY FEED WIRE AND VOLTAGE REGULATOR WIRES FOR DAMAGE OR LOOSE CONNECTIONS,CHECK ALTERNATOR FUSE AND MAKE SURE ALTERNATOR DRIVE BELT NOT LOOSE SLIPPING OR BROKEN.

Jun 26, 2011 | Pontiac Sunbird Cars & Trucks

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Inconsistent charging voltage (12-13.5 volts). Had alternator rebuilt and checked good on bench. Still not charging correctly


I would guess the alternator is trying to run a maximum capacity, thats usually why they get hot, if you put the alternator on, take it back to the parts place you got it and have them warranty it, if you had a shop do the reapirs a year ago, you should still have warranty on it.. ps the light may flicker if its overcharging as well as undercharging. usually the regulator internally is bad.

Good luck.

Apr 22, 2011 | 1995 Jaguar Vanden Plas

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

Voltage gage is fluxuating when I use turn signal, windows, lights, ect... as if the alternator was going bad. Replaced alternator and battery and still have the same problem. When the car is not started...


IS THE IDLE SPEED SET TO SPEC OR SLOW?, HAVE THE ALTERNATOR AND BATTERY TESTED, AUTOZONE DOES THIS FOR FREE, ALSO A WEAK DEFECTIVE BATTERY CAN CAUSE THIS, THE ALT IS WORKING HARD TRYING TO KEEP THE BATTERY UP, ANY ADDITIONAL LOAD CAUSES THE VOLTAGE TO DROP.

Nov 03, 2009 | 1995 Chevrolet Blazer

2 Answers

1998 k1500 5.7l 105a alternator. replaced


Now change the sulfated batery for a new one.
Vitally

Sep 09, 2009 | 1998 Chevrolet K1500

1 Answer

1992 Nissan Pathfinder charging problems


How long did the 2nd alt. last before it died? The voltage regulator is, I believe, attached to the alternator. Have u had the voltage regulator checked?

Jan 04, 2009 | 1992 Nissan Pathfinder

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