2006 Chrysler 300 - alternator trouble

I’m having a problem with my 2006 Chrysler 300 Touring. My alternator isnt charging up my battery both are brand new when i turn the car on i put my voltage meter on it to check the voltage the meter goes down instead of going up and i check to see if there is power going to the alternator and its getting power i don’t have a clue of why its not charging my battery but when the vehicle stalls and shuts off my voltage reading kicks back up to 12.58 any help will be greatly appreciated

If I remember correctly, your voltage regulator is in the PCM…

Check all your fuses…

You can have the parts house check your alternator (bench test it)…

I have seen plenty of mechanics recommend an alt replacement when it was the reg in the PCM…

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