Question about 1991 Dodge Ram

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2002 Dodge Ram 1500 ,4.7L V-8 Battery is not CHarging

Once truck is started, truck shows proper battery charge, then check guage light comes on, and voltage meter drops to no charge. Usually happens with in minutes of driving. Ive replaced battery and alternator. checked all fuses, and used meter for all wiring, and battery feed. A Mechanic friend looked at it and wasnt able to get a code when connecting his scanner. However he did figure out by turning the ignitioin key on and off twice to get code to pop up on digital read out where the mileage shows, OBD-II code 622. In my repair manual it says Alternator field control circut not switching properly. My friend says i need to replace PCM to fix problem, I wanted a second opinion!!!!

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A lot of Chrysler products have the voltage regulator in the computer. I would check the charging system wiring first for poor connections and if nothing else is found there is nothing else for you to do but change it.

Posted on Dec 09, 2008

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2000 dodge ram check guage light comes on. have a new battery and new alternator. also blew a 50 amp fuse.


Hi Les, I;m glad to help. There is an fusible link that runs off the battery cable pull on it and see if it comes apart, if it does replace it and see if everything is working properly. Hope this helps and have an awesome day Les.

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The first thing you need to do is scann the codes for the check engine light, the computer is always watching all systems when it sees a problem it stores a code with the problem and turn on the check engine light, for example in could have a code that reads po301 cylinder 1 misfire, you would then know cylinder 1 is misfiring and then with somw testing see why its misfiring. there are many auto part stores that will scan the codes for free and give you a print out with the codes, if you get the codes i can help you better. the charging gauge you will need to have the alternator checked to make sure its not over charging, if it is then that would turn the light on, good luck.

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Hi and welcome to Fixya!

As a first course of action, I strongly suggest that you clean or replace the battery connectors if necessary. This may be the cause why the battery light is on.

Once the battery connectors are all set please tighten the cables.

Hope this helps and thank you for using FixYa! Have a good one!

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1 Answer

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I would think this should lead you to think that your problem is in the components which charge the battery, and not the battery itself. Voltage should remain over 12 after it is running or the battery is not being charged. If it is not being charged, it is being drained.

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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.

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1 Answer

MAY NEW ALTERNATOR PUTS OUT 14 VOLTS WHEN I START THE DIESEL 5.9


the voltage regulator is in the computer,check you battery with volt meter with engine off it should say 12volts then check it again with engine running and it should say 14-15 volts. if not the you will have to take it to a dealer to check the computer,hope this will help you!!!

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1 Answer

2001 ram would not start, but when started it ran rough & stalls


Your electronics won't work properly if voltage is low. Charge and load test battery to make sure it's good, then check charging system to make sure it's operating. Once that's squared away you can diagnose running problem if it is still there.

Aug 28, 2009 | 2001 Dodge Ram 1500 Truck 2WD

1 Answer

2001 dodge ram keeps over charging battery


you need to have the pcm checked...it acts as the voltage regulator

Mar 16, 2009 | 2001 Dodge Ram 1500 Truck 2WD

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My 2001 dodge ram 1500 5.2 v-8 check gauges light comes on and the battery gauge is not charging half way and as soon as I drive it , the gauge goes to none charging but I can drive it and it doesn't give...


on the alternator did you put the little washers where the regulator bolts on back of the alt they must be tight and also the ground cable from the battery to the alt bracket must be tight and grounded sounds like a loose connection
the washers go between the alternator and wires coming out of the harness and the alt also it probalbly goes dead occasionally when you crank it up

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