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post #1 of 11 Old 11-19-2009, 08:53 PM Thread Starter
mlesthay
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Battery gauge went to max

2000 Durango 4.7L

Driving home from work today and my check gauges light came on and I noticed that it was the battery gauge. It was all the way to the right (18 I believe). It went back to the normal range but then it happened again a few minutes later. I had the system checked out at Advanced and the guy stated that everything passed but it was most likely the voltage regulator. Is the regulator inside the alternator? Some post on the forum make it sound like the ECM controls the charge rate.

2000 Durango SLT, RS9000 Rancho's, 4.7L, 4x4, *Superchips tuner on the way*
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post #2 of 11 Old 11-19-2009, 09:08 PM
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This could be a case of "Dodge Alzheimer's Syndrome". The CTM or the cluster is losing it. I'm betting the regulator is fine. Do you have access to a meter to compare readings when it pegs?

Paul
02 Durango (build 11/01) SLT┼ AB/BLACK INT 4.7L NGC 45RFE PT3.55 LSD 4X4 - Superchips 3715 Performance - Sensatracs - Chrome Nose - Carriage Works Billet Grilles - APC Clear Corners - Infinity 6022i's w/stock tweeters - - Hidden Hitch - Silverstar 9007ST's - K&N high-flow 33-2175 air filter- TFP Chrome Handles - 33K Miles - (MB Gunner Chrome Wheels + General Grabbers wintering in basement) Hammered blue factory rims
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post #3 of 11 Old 11-19-2009, 11:08 PM
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do you have a system in it? i know this used to happen to me before i upgraded my alt and added a battery because the system was drawing too many amps..

03' Durango SLT 4.7
Lift: T/S Lift, 3" Body with 285/75/16
Audio: Pioneer AVH P5000DVD, Hifonics Brutus 1500d, 2x 15" ED Subs
Exterior: 5% tint, 4x Hella 500 100watt lights
Performance: Dynomax UltraFlow SS, K&N Drop In, Superchips 91

98' Durango SLT
Current: 5.2, tint, Stock everything else
Future Plans: 408 swap, Lower 3", Shave All handles, ?
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post #4 of 11 Old 11-20-2009, 05:46 AM
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wouldnt hurt to have your alternator checked ... my Ram Van burnt because the alternator kept overcharging, caused the battery to explode, gases caught on fire, acid splashed everthing and it was totalled .......

My gauge never spiked, but I'm just saying ... it wouldnt hurt to get it checked

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post #5 of 11 Old 11-20-2009, 06:55 AM Thread Starter
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Thanks for the replies. So far its only happened a few times and unfortunately its been while I was driving down the interstate so getting a voltometer on it would be a challenge.

I've got the factory stereo in it with no addons.

I did have the alternator checked. But some post on the forum state that there is no voltage regulator in the alternator and that the ECM controls the charge rate. I dont want to buy a new alternator when it may be a ECM issue. Does anyone know if the alternators on the D's are like most cars and have the regulator built in to it?

thanks.

2000 Durango SLT, RS9000 Rancho's, 4.7L, 4x4, *Superchips tuner on the way*
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post #6 of 11 Old 11-20-2009, 08:12 AM
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VOLTAGE REGULATOR
DESCRIPTION
The Electronic Voltage Regulator (EVR) is not a
separate component. It is actually a voltage regulating
circuit located within the Powertrain Control
Module (PCM). The EVR is not serviced separately. If
replacement is necessary, the PCM must be replaced.
OPERATION
The amount of DC current produced by the generator
is controlled by EVR circuitry contained within
the PCM. This circuitry is connected in series with
the generators second rotor field terminal and its
ground.
Voltage is regulated by cycling the ground path to
control the strength of the rotor magnetic field. The
EVR circuitry monitors system line voltage (B+) and
battery temperature (refer to Battery Temperature
Sensor for more information). It then determines a
target charging voltage. If sensed battery voltage is
0.5 volts or lower than the target voltage, the PCM
grounds the field winding until sensed battery voltage
is 0.5 volts above target voltage. A circuit in the
PCM cycles the ground side of the generator field up
to 100 times per second (100Hz), but has the capability
to ground the field control wire 100% of the time
(full field) to achieve the target voltage. If the charging
rate cannot be monitored (limp-in), a duty cycle
of 25% is used by the PCM in order to have some
generator output. Also refer to Charging System
Operation for additional information.

Paul
02 Durango (build 11/01) SLT┼ AB/BLACK INT 4.7L NGC 45RFE PT3.55 LSD 4X4 - Superchips 3715 Performance - Sensatracs - Chrome Nose - Carriage Works Billet Grilles - APC Clear Corners - Infinity 6022i's w/stock tweeters - - Hidden Hitch - Silverstar 9007ST's - K&N high-flow 33-2175 air filter- TFP Chrome Handles - 33K Miles - (MB Gunner Chrome Wheels + General Grabbers wintering in basement) Hammered blue factory rims
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Work Ride : 2009 Ford Edge SEL
Daughter's Ride : 2011 Jeep Compass Latitude
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Son 2's Ride : 2006 STi Stage 2 Grandma Gray (kinda mine, too
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post #7 of 11 Old 11-20-2009, 08:15 AM Thread Starter
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while most of that is as clear as mudd, ha! it could just be the battery dropping voltage and the PCM may be boosting the charging voltage. Does that sound reasonable?

2000 Durango SLT, RS9000 Rancho's, 4.7L, 4x4, *Superchips tuner on the way*
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post #8 of 11 Old 12-21-2009, 09:54 PM
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Mine did the same thing. Battery had an internal short. Replaced it and no problems. The battery was like 7 years old and the summer was torture in Texas this year. Replaced two batteries this year so far, the other in my truck after the first freeze a month ago. The car battery isn;t doing so well either.

How old is your battery? Some times the solution is the simplest.

2000 Black SLT 5.9
4x4 AWD w/ tow package
Coming on 190k and still strong
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post #9 of 11 Old 01-13-2010, 06:18 PM
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I had the same pob, i replaced the batter and added another batter with an isolator for my stereo. havent had any trouble since
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post #10 of 11 Old 04-01-2010, 10:58 PM
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I had this same problem but it was because of the battery terminal. Didn't clean it for a while and had a lot of buildup. Ate through a lot of my terminal so it would always misread
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post #11 of 11 Old 04-08-2010, 02:09 PM
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Quote:
Originally Posted by murderedout03 View Post
I had the same pob, i replaced the batter and added another batter with an isolator for my stereo. havent had any trouble since
Just out of curiosity, where the hell did you find the place to put a second battery? I want to do this when I get my winch since I don't want to accidentally drain my main battery....
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