Question about 2003 Dodge Grand Caravan AWD

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I am getting charge from my alternator to the battery. However when I run the heater and the Lights, the it loses charge (Drops from 12 volts to 10 Volts) when the heater motor is on and the headlights are on. The alternator is working and has attraction at the rear center (using a metal non shielded screwdriver). There is a black clip on the back of the alternator that doesn't want to come off and it has 2 or 3 wires running into it. It seems it would just be a "press the tab on the clip and pull the clip off" but she is being stubborn and won't come off. I don't want to break the lock on the clip so I have just left it alone for now.All the electronics are factory installed. I was told there could be a module in or on the alternator that might be the problem but don't know if it's inside the alternator or outside where the black clip is. I have turned the interior lights off. When I connect my positive terminal and touch the negative to the post, My Factory DVD player's display flashes on and off once quickly. Basically MY battery dies at random. I can boost it one day, drive to work and it's dead by the time I go to start it, or it might go a few days and then if you have the hatch or the door open for 5 minutes with the engine off it will click and the bells and whistles work, but not enough juice to turn the starter. I am very confused. Shawn

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  • Zionblue Nov 19, 2009

    I had a fellow over this evening and it seems everything is pointing to the voltage regulator. I switched out batteries and we tested the alternator bypassing the voltage regulator and she's cranking out high voltage. Have not been able to pull the Voltage Regulator at the moment so I can't have it tested.

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  • Master
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Your alternator should be putting out between 13 and 14.5 volts so your charge is low. Also, the module you are refferring to is the voltage regulator. most manufacturers have began to install the regulator inside the alternaotr instead of externally. So your regulator could be bad and the alternator itself good. However, if the regulator is bad youhave to replace the alternator if it is inside the alternator.

hope this helps.

Posted on Nov 18, 2009

  • Chris Yelton Nov 19, 2009

    If the regulator is inside the laternator then you may not be able to get it out without replacing the whole thing. Im not 100% sure on chrysler products.

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  • Dodge Master
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Have battery and alternator tested sounds more like battery not holding charge some auto stores such as auto zone / advanced auto test for free

Posted on Nov 18, 2009

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