Question about 1999 Dodge Grand Caravan

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Voltage regulator won't work...need kit

My 99 Dodge Caravan is acting kinda funny. I've been working on the alternator...and apparently it's not the alternator...so the next step would been the voltage regulator...which I believe is in the computer system. But while talking with a mechanic, he made sure to let me know that Dodge Caravans are awful and the computers fail all the time. Here's the deal. It's not the alternator, and I know it's not the battery, but this mechanic said something about a kit that would bypass the computer to the battery??? I'm not real sure on this...but I need to know a) if this exists b)If this will stop all my other computer operated systems from working c) if this can be done easily d) does someone with more experience need to do this, or can I do it with little or no help... If you have any information, it would be greatly appreciated! Thanks for posting on this website, and checking this post.

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Bypassing computer is a bad idea as all sensors will be disabled therefore the car wont run all sensors are needed to feed fuel &moniter engine

Posted on Jun 16, 2009

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2 Answers

I am getting a code telling me my voltage regulator diodes are bad on my 1996 Dodge Grand Caravan. Should I be replacing the PCM to fix the problem.


Not sure about the 96 but, voltage regulators generally have to do with the alternator. As a matter of a fact you can just replace the voltage regulator on the alternator as opposed to spending the money that it cost to replace the whole alternator, I found this out because a mechanic ripped me off and charged me for a alternator but, he only replaced the voltage regulator diode part on the alternator.. Replacing the PCM is going to be expensive and in my opinion not necessary

Feb 09, 2017 | Dodge Grand Caravan Cars & Trucks

1 Answer

Voltage regulator


In some brand of alternators the regulator and brushes are an integral part and it is a matter of removing 2 screws and lifting out the part. On others the regulator is entirely separate unit located some where else on the vehicle. The voltage of 15.3 is on the upper end of the charge rate but it would be acceptable . Nominal voltage for a regulator is 14.5 to 15.5 volts. Understand that a battery is actually 13.2 volts not 12 volts and you need 14 volts for the battery to charge effectively. The higher the voltage the higher the amperage to run everything so if your alternator regulator is set at 14.5 volts then the max amps of the alternator would not be reached and if you have a current draw to run everything that is more than the output of the alternator then the battery will eventually go flat. Find yourself a reputable auto electrician and discuss the problem with him not a local mechanic

Dec 16, 2013 | Dodge Grand Caravan Cars & Trucks

2 Answers

I have a 2000 Dodge Caravan battery won't stay charged


You might have a bad alternator. Take your battery in to have it tested and if it is good then it is probably you alternator. Good luck

May 22, 2011 | Chrysler Town and Country Cars & Trucks

1 Answer

New alternator doesn't work due to computer


You have to replace the ecm or wire in an old style chrysler voltage regulator. I can tell you how if you need me to.

Jun 07, 2010 | 1991 Dodge Caravan

1 Answer

1993 dodge caravan, over charging, replace the alternator, was tested and told it was bad, still over charging. Was told that the computer controls the voltage output, do I replace the computer system now,...


The computer has NOTHING to do with the alternator output.
The alternator is self regulating, with diodes, and rectifiers.
If the alternator is over charging it is because your battery is not accepting the charge, so the charger works harder and produces more to charge it, up to a point.
Was the alternator that you installed new or rebuilt ?
It could be another bad alternator.
Please let me know.

Feb 11, 2010 | 1993 Dodge Caravan

2 Answers

I replaced the alternator twice and the new alternator is not working?


It probably isn't the alternator that is bad, but rather the voltage regulator, which by the way is in the computer behind the battery.

Oct 30, 2009 | 1990 Dodge Grand Caravan

1 Answer

Voltage regulator not working wear is it at


It's in the alternator. Not user serviceable. Replace the alternator. Make sure the battery is good too.

Jun 22, 2009 | 1991 Dodge Caravan

2 Answers

The Batter Is Not Recharging But The Alternator Is Fine...


The 99 caravan has the voltage regulation handled by the engine control computer. Most of the time (not always) the check engine light will come on while driving or even be on all the time. If the dash works sometimes its not the fuse the battery going low can make the dash go out this is very hard on it. A scanner used for dianostic test will find the problem with the right person useing it. The battery needes tested though as it can be the only problem

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1990 dodge caravan voltage regulator location


The Voltage regulator is in the PCM.

Jul 08, 2008 | 1993 Dodge Caravan

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