Question about Jeep Grand Cherokee

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Alternator overcharging the engine is on the voltage reading go from 14 v to 19 v check gauges laigth com on

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I would need to know what year the Jeep is to comment on the overcharging problem as well as the code 37 problem.
There could be a voltage regulator on the alternator, or it could be built into the engine computer.

Posted on Jul 12, 2013

6 Suggested Answers

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Posted on Jan 02, 2017

  • 12 Answers

SOURCE: Alternator may be overcharging?

Yes It sounds like the voltage regulator inside the alternator has gone wide open .It can also ruin your battery and explode the battery.I would have it hooked up to a alternator tester and just to make sure it's not just your gauge.hope this helps

Posted on Jan 24, 2009

  • 179 Answers

SOURCE: charging

Most likely it is the voltage regulator that's going bad which allows overcharging. this is inside the alternator, so it most likely needs replacement. you could pull it out and take it in to most auto parts stores and they would check it to make sure.

Posted on Jul 06, 2009

alicantecoli
  • 22156 Answers

SOURCE: battery overcharges

put a new regulator on and dont use secondhand bits from scrapyard

Posted on Jul 16, 2009

Mustgo
  • 2359 Answers

SOURCE: battery test proper voltage, new alternator test

Battery by itself with no cable attach should read 12.4V for low and 13.6V for fully charged.

With both terminal connected a health charging system should read 13.6 to 13.8V

Amp gauge should read positive when chagring and when discharging it should be on the left (negitive side)

====
Troubleshooting

Key has to be out of the ign.

Charge battery to the max with terminals off the car.

Test voltage and make sure it's between 12.8 to 13.6V

Check the battery CCA and compare it with a battery load tester.
CCA that read 60% below the sticker is a BAD battery.

Cannect the + terminal.

Carefully touch the negitive terminal to the neg. battery post.

Make sure all doors and light are off

You should get a little spark.

A large spare is equal to a large load.

An amp meter will give you a better idea what the drain is.

A short is hard to find and it will take time.

Work on one fuse at a time until you find the load.

Posted on Jul 17, 2009

  • 13 Answers

SOURCE: speedometer, tack, fuel gauge, temp gauge have erattic behavior

With Ign. off what is your batt.voltage reading than take neg. cable off and take another reading 5 min. later. It sounds like a intermitten short, try to isolate voltage drop when acting up. Gauge circuit would be a good start. Schematic would be helpful.

Posted on Sep 02, 2009

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Installed new battery. Now lights are burning out. Was told may need a reset so battery and alternator are on the same page. Is there a code I can use or something?


Changing a battery will have no affect on lights burning out. If the voltage regulator inside the alternator is bad this could cause lights to burn out as it will cause too much voltage to be produced unregulated. If this is so, the check engine light will be on and the charge gauge will be high and you may smell the battery overcharging. Hook up a voltmeter to the battery. It should be around 14.1-14.6 volts. If within this reading, your problem is most likely coincindental

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I was driving my 1998 jeep wrangler yesterday when the check gauges light came on I saw that my voltage gauge was pegged on the over voltage side I pulled over and it died. I had it towed home and tod


Hi Danny, I'm Al the owner of Big A's Auto Repair
Danny, it's possible the over charging my have blown some fuses. Check all the fuses and replace the ones if any blew. NOTE: If the problem you having is the engine will not turn over then make sure the overcharging did not melt the starter or damage the battery. For further assistance go to my website. Have an awesome day Danny.
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My battery is putting out to many volts


typical problem of an shut alternator. the voltage regulator bridge of the alternator is not working properly. only solution is to change it. if youu smell rotten egges when car is running thats it!

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2004 envoy alternator gauge pegging


alternator could be overcharging, cause of this is a bad voltage regulator, it should be internally in the alternator, (a way to tell this is to check your battery to see if it looks like its swelled, or pull alternator off and have it tested). if voltage regulator is bad it's more cost effective to just replace the alternator. but if not then good possibility your gauge has gone out.

Sep 13, 2012 | 2004 GMC Envoy

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1988 Nissan Pickup keeps going through alternators and batteries


Next time it's overcharging check the voltage on the two white wires and the black wire with the connector plugged in and the engine running. The two white wires should be the same voltage. There should be no voltage on the blacks wire. If there is voltage on the black wire than check for a bad ground. If the voltage on one of the white wires is different than the other than you'll need to dig into the harness and check for corrosion in the wire with less voltage. Are you familiar with how to check for voltage drops? This might be and effective test when the alternator is acting up as well. I can explain it to you if we need to do it. Btw, the readings that your are seeing are volts not amps. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

Feb 01, 2012 | Cars & Trucks

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

Speedometer, tack, fuel gauge, temp gauge have erattic behavior


With Ign. off what is your batt.voltage reading than take neg. cable off and take another reading 5 min. later. It sounds like a intermitten short, try to isolate voltage drop when acting up. Gauge circuit would be a good start. Schematic would be helpful.

Aug 12, 2009 | 2000 Ford Windstar

2 Answers

Alternator may be overcharging?


Yes It sounds like the voltage regulator inside the alternator has gone wide open .It can also ruin your battery and explode the battery.I would have it hooked up to a alternator tester and just to make sure it's not just your gauge.hope this helps

Jan 24, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Replaced loose battery terminal and alternator light is now on


If an alternator overcharges, it will most probably spit out electrolyte from the filler caps or vents when run for a time. It may also become quite hot to touch.
Providing the engine is starting OK, and the charge warning light on the panel is not alight or flashing on and off, what you need to do is have a voltage check done on the battery with the engine running. If the alternator is OK, the voltage should be in the vicinity of 13.5- 14.0 volts (13.8 is the accepted "standard").
Any higher, it could indeed be overcharging.
Turning on the headlights should not materially change this voltage.
If the voltage is only around 12V or even less, turn on the headlights, and observe it again.
A low voltage can mean the alternator is not charging.

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