Question about 2000 Dodge Durango

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Regulator problems I have replaced my alternator twice, still it starts to charge, then falls flat, check gauges light comes on, one shop thinks its my computer, since the regulator is in the computer, one shop says they can install an auxillary regulator on my alternator and bypass the computer. Any thoughts?

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  • jsdfleetdsc Nov 22, 2008

    I replaced the fusable link once on my fuse panel, is this where the alternator fuse is?

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The computer regulator is very hard to burn out. Just make sure all your battery cables are good and the alternator fuse is good. There is a fuse.

Posted on Nov 22, 2008

  • if you raise the ideal does it start charging some of the regulaters in the computer dont charge at idle or if it is idled to low

  • It should have a regular fuse for the alternator, besides the fusible link.

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"check gauges" ligh comes on.


i have 08 , and full docs. 06 is pre 07 major changes.
when alternator quiets(i didnt say bad, even the belt can slip or fall off?
the battery is weak, 12.6vdc rested is charged, yours is not charged
and running its 13.4 to 15vdc if not.then its one of these.
check all fuses first.
1: bad battery. (one cooked cell and curtains.)
2: bad wiring to altnerator (or it's fuse,.hint?)
3: bad alternator.
4: bad PCM (i think reg is in the PCM. alldata.com, look)

the regulator is designed to not attempt to charge a damaged battery.
this is so the voltage does not spike and blow up $5000 worth of electronics, (new not , wrecker parts prices)

did you fail to scan it, the PCM will report vast numbers of errors. on this . scan the PCM.
see those errors. (bet battery low, and more)
????????????

no engine stated, and that is KEY on call cars.
some have different PCM and charge paths. fact.

Feb 21, 2014 | 2006 Jeep Wrangler

1 Answer

I have charging problems replaced alternator twice


Is your voltage regulator internal in the alternator? If not, you may try replacing that since it regulates the voltage being put back into battery when used by the car. Make sure there are no things remaining on when you turn vehicle off. An item that was installed by a third party like a radio or driving lights or similar stuff could effect the draining of a battery. If you replaced the battery, be sure you get one with the most cold cranking amps you can find. You may also install a voltage gauge in car to check your voltage as you drive your car. Cheap batteries that you may purchase are exactly that, cheap. Investing in a good battery can help and remember if it goes bad prematurely you can bring it back and get a pro-rated price return on it depending on the quoted months listing on it. For example a 72 month battery is suppose to last 72 months+ and can be returned or prorated towards a new battery. Alternators are also in this same type of group. You want to by a decent one because the cheap ones are bad. Many Autoparts stores will test both of these items for free for you. I suggest having one check those parts and that way your not replacing things that could possibly be still good. It could be something else completely causing the problem.

Aug 11, 2013 | 1998 Mitsubishi Eclipse

1 Answer

I replaced the alternator 2 times and it seems as if the regulator is not charging the battery alternator test good and battery test good, is there another source to check such as the computer. Help


Need more info, is the vehicle battery draining down overnight and wont start in the morning?

Do you have a alternator gauge or light? Is the gauge at a negative or light on? Why do you think it not charging? If you say the battery is good..Give me as much information as possible, year, make, model, motor size...and I will do my best to get the problem solved for you. Thanks.

Jul 21, 2011 | 2005 Chevrolet Colorado

1 Answer

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

1 Answer

I have an 86 toyota pcickup battery charge light is on have good battery and replaced alternator twice.


i think you have an external voltage regulator in that year , ck that first . The easy way to tell if it has an external regulator ,if it has carburated it has an external regulator if its fuel-injected its internal regulator in side the alternator.Have you checked to see how much voltage the charging system is putting out at an idle ? It should be around 13.5 volts to 14.5 volts any less then 12.5 charge light won't go out.

May 05, 2011 | 1986 Toyota Pickup 4WD

1 Answer

Recently i hear noise coming from under the hood, when my rpms are high, the gauges start dimming. Could it be my alternator? Belt looks good. battery gauge level is right.


If the lights go dim while driving then the charging lights should come on and that means either the relay is braking down or the regulator in the Alternator is braking down .
Its quicker and cheeper to get it checked out by a elect shop than buying a Alternator and still having the problem after, as the alternator should charge about 13.5 volts while running.. Ron

Nov 23, 2009 | 1998 Chevrolet S-10 Pickup

2 Answers

My 7.3 L diesel ford f-250 shows the battery light (check charge system) on in the dash. I tried to drive it and the voltage gauge started dropping into the 10-11 v range. I replaced the alternator...


You must have an older vehicle,but I am pretty sure the 7.3 was put out after the voltage regulator was put in the alternator.What you are describing is a voltage regulator on the the firewall.If this is so,replace the voltage regulator on the firewall,with a new one.This will be the problem most likely.The voltage regulator on the firewall should be kind of flat,almost square,and a wide plug,goes all the way across the voltage regulator.If You don`t have external regulator,then it is built in the alternator,and the alternator you purchased is bad.Be sure the wires on the back of the alternator are not broken anywhere.The big post ,largest wire,on the back of the alternator is the out put wire.It should go to the battery.If it does not have 13.65 to 14.25 volts on the back of the alternator,and at the battery positive post.Like I said,I believe the voltage regulator is on the firewall,if it looks like I described,then it is a regulator,replace this part(voltage regulator)and it will solve your problem.I hope this was some help,please let us know,thank you.

Oct 15, 2009 | Ford F-250 Cars & Trucks

1 Answer

I have a 2004 Mazda 6 with the 2.3 liter engine. I have replaced the altenator 4 times and the battery twice because the battery light comes on and the transmission shifts to the 3rd gear. When the...


Could be a eloctronics fault! Have a reputable autolect.shop do a diagnostics check, alternativ solution fit a Bosch replacement alternator.
Regards
Phillip

Sep 12, 2009 | 2004 Mazda 6

1 Answer

96 Jeep GCL wants to turn over, but can't unless ur give gas


To begin with, a 45minute charge is insufficient to fully charge a battery. A "quick charge" can damage the battery by overheating the plates, causing them to warp and shed lots of oxide that falls to the bottom and acts as a short. I've found that charging at 10 amps or less for up to six hours works best. After charging fully, the battery must be load tested (generally a 200amp load is applied and the battery voltage should not fall below 9.5 volts...test is under 15 seconds or it can damage a good battery.)
Next is the charging system. I use a simple but fairly reliable method for doing this. With the car running, place a volt meter on the battery and read voltage with all accessories off. Volts should be under 14 and above 13...generally about 13.5....Then turn on everything electrical in the car. Volts should not be less than 12.9 but 12.5 is OK as long as it does not drop further. After running for about ten minutes, voltage should not creep downward below the 12.5 mark. It may vary as regulator comes on and off but it should not drop. When some shops check an alternator, they "full field" it...this tells you that the alternator itself is able to charge the battery but does not tell you if the regulator is working correctly.
If the voltage is below specifications either the alternator or voltage regulator has or is failing.
On some Jeeps, the voltage regulator is in the computer (I know...really bright) and if it is it cannot be replaced separately. If regulator is inside the alternator you can change it or replace the alternator.
You can also have something in the system drawing down the battery, but from what you wrote, I don't think you have a problem there.

Aug 13, 2009 | 1996 Jeep Grand Cherokee

1 Answer

Alternator needs to be replaced?


On my 72 datsun 510 the charge light came on does it mean my I own a shop, and have worked on cars for many years. I think you could have a bad voltage regulator. The light comes on when the alternator output falls below an acceptable level. The older vehicles has a regulator that is not part of the alternator, but some are. This is something you will just have to determine. A loose belt that is slipping will also cause the light to come on. I guess you have looked for the obvious like a broken belt, bad cable connection, or a broken wire at the terminals on the alternator?? Hook a volt meter to the back of the alternator to see if it is putting out at least 12 and 1/2 volts. If it is; look for the voltage regulator. The old style regulators were big & bulky, had points in them that stuck, and sometimes you could hit them with a wrench and they would unstick, and go to working right. Find an older mechanic that understands the older systems, and have it checked out. Most parts stores will check the alternator for free, but if its a younger person doing the test, he/she may not know how to test the system properly. If you can get a good hold on the pully of the alternator, and you are able to turn it inside the belt, then the belt may be the problem, and need to be tightened up. Look for a square type metal box on the fire wall, or around the sides of the radiator, and you may have found your regulator. There is no way any one on here can determine what you have without physically looking at the vehicle. Your vehicle is on the boarderline of when they were changed over, and you may, or may not have a regulator outside of the alternator. Some of the regulators had screws on them that you can take the cover off them. These can be took apart and file the points in them, put back together, and they are good to go for a while. Glad to help out, Good Luck!!!

May 15, 2008 | 2000 Datsun 510

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