Question about 2001 Dodge Durango

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Charge gage is reading 18 volts

My check gage light came on today. The votlage gage was reading 18. When i stpped at red light it went down to 14 but came back up in less than a mile would could be the problem

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My check gauge light came on as well...I put in a new battery & alternator but still does the same aft some time...I need help

Posted on Jul 22, 2013

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Need to have alternator output checked. sounds like the voltage regulator is going out. this is inside alternator.if it starts charging this high it can blow your bulbs and damage computers

Posted on Oct 03, 2008

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2002 mercury montaineer , battery light comes on , they gages shut down couple minutes after then the truck acts like it gonna shut off....when getting a jump, the truck fires right up, couple minutes...


Your battery is definitely low. First clean the terminals on the battery and the inside of the terminal rings on the wires. If you have a slow charger put it on that overnight and see if it holds a charge. If it still keeps depleting or doesn't charge overnight then either your battery or your alternator are done....possibly both. So take the battery to have it load tested. Most places that sell them can test them. If the battery is done replace it then test the battery with a volt meter. If the old battery is still good put it back in the vehicle and test the voltage with a volt meter. With the engine off the voltage should read 12 volts (once its fully charged or if its new) with the engine running it should read around 14 volts. If it is way higher than that or it doesn't go up at all your alternator requires replacing. Alternators are fairly easy to replace but if you don't feel comfortable with that take it in to a mechanic.

Jul 25, 2011 | 2002 Mercury Mountaineer

1 Answer

Driving down the highway turn lights on battery power drains (check guages light comes on) turn lights off battery continues ot charge and hold a charge. . generator? Alternator?


first of all, check voltage at battery car off should read at least 12.5 to 13 volts. now start car. at battery it should read at least 14 volts, if lower then 14 volts check alternator.

Dec 17, 2010 | 1998 Dodge Ram 1500 4WD

2 Answers

My "check charging system" keeps


first thing you should check is the battery. to do this you should buy a multimeter from a parts house and set it on volts. with car off check charge of battery. it should read 12 volts. start car and retouch red probe to positive and black probe to negitive. it should read 13 to 14 volts. if it still
reads 12 or anything below 13 volts you need to replace alternator. also check wires from alternator to see if any are loose.

Dec 06, 2010 | 2004 Mercury Mountaineer

1 Answer

I have a 06 dodge 2500 5.9L my voltmeter inside my truck reads about 9 to 10 volts when I first start my truck in the morning and my check gages light comes on. After turning my truck off for about 5...


It sounds like your alternator is not kicking in when the truck first starts. There is a wire that "tickles" the alternator to get it charging when you first start the truck, however it will start charging without that once you rev the engine up. A couple of good shots with the fuel pedal should snap the guage up to 14. If it climbs up slowly to 14 then the alternator is starting to wear out or you have poor contact.Get the alternator tested for output. If it's okay take the wires off the alternator and battery and clean up the ends so you have bare shiny metal and clamp them back down tight. Make sure you have radio codes and procedures before you unhook the battery. Hope this helps.

Sep 04, 2010 | 2006 Dodge Ram 3500 Truck

2 Answers

1985 dodge powerwagon, lights went dim driving home now wont start, just replaced battery 6 months ago. starter clicked at first then nothing.


The alternator may not be charging the battery. Jump start it, and use a volt meter at the battery, red lead to positive and black to neg. The meter should read between 13 and almost 15 volts, any lower than 13 volts, the alternator is no good. (this is done with vehicle running).

Feb 02, 2010 | 1985 Dodge Pickup 4WD

1 Answer

Check Gages light comes on 99 GMC Surban


one of the gauges must a fluxuated enough to have the computer turn the light on,I've seen mostly gas gauges fluxuate,but train your eye where the voltage is in normal mode because it will still look like the needle is up there but it may only be 11 volts instead of 13-14 volts running.

Dec 07, 2009 | 1999 GMC Jimmy

1 Answer

My 2005 ford explorer check charging system warning light


if charging light is on w/ engine running,the fault could be the alternator or another component of the charging system.remove, clean and tighten battery post connections to check for alternator output,use a volt meter or multi-tester set to 50 Volts DC,w/ tester on battery terminals it should read 12 volts W/ engine off;13 to 14 volts w/engine running.if voltage increases when alternator is spinning,suspect battery

Sep 28, 2009 | 2002 Ford Explorer

1 Answer

Electrical/Battery Light


Hi,I am Ron,Look at the alternator out put voltage,and have the battery load tested.Also check bad connection from battery to alternator(this is the large wire/cable).alternator turns the battery light on,why?You need to figure out witch one.A diode could be going out in the alternator,diodes change ac voltage to dc voltage ,that`s why the call it a alternator(alternating current)AC voltage means alternating current. If it goes unrepaired it can ruin battery,changing battery voltage from 12 volts dc to 12 volts ac.Also there is a built in voltage regulator that holds voltage down to about 14 volts charging while car is running.Voltage regulators can cut off charging completley or open wide allowing alternator to charge as much as 18 volts dc,ruining battery(boiling battery acid out of battery)and ruining alternator by burning fields and rectifiers out.So have it checked or do it your self.Auto parts stores can check alternator and battery.If I can be of more help,please ask.roniecon@gmail.com

Jul 19, 2009 | Ford Five Hundred Cars & Trucks

1 Answer

Battery charge spiked up on 1994 jeep grand cherokee ltd.


check the battery cable connections, are they clean and tight? This can cause the charging system to spike and go into the 16-17 volt range, the other thing is a problem with either the alternator or the voltage regulator, a diode that is failing can cause this issue.

Dec 18, 2008 | 1993 Jeep Grand Cherokee

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