Hello everyone.I have a grand caravan 2005 with the battery light on.....we change the alternator and the battery with new ones, but the light remains on.
Help please! any ideas.

 

Did you test the battery and alt before replacing them? Have you checked the battery voltage with a multimeter when the light is on? Is the light on all the time?
Assuming you don't have some big short/large parasitic draw going on, about the only thing left is the voltage regulator, which is located in the PCM.