Question about Plymouth Voyager

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Alternator putting out too much power on a 1992 3.3l plymouth grand voyager.

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  • benach5 Oct 31, 2009

    the original mechanic that responded to my problem says that the voltage regulator is in the computer. I was inclined to believe him because I have never had a chrysler alternator read above or fail. I have put millions of miles on these vans. I am assuming the alternator is set at the factory to output 2 volts above the 12.6 volts that the battery runs on. I have never had one over produce. I thought the voltage regulator is transistor set at that voltage. there is no adjustment. how could it produce over that set voltage? both you and the first mechanic have exactly the same positive percentage rate for your answers. would like more input.

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Your alternator has a built in voltage regulator, if it fails, you will end up getting high, then low voltage spikes that will end up destroying your computer and electrical systems throughout the van. The alternator can be rebuilt, but for moneey and time conciderations....just replace the alternator.

Posted on Oct 31, 2009

  • Chip
    Chip Oct 31, 2009

    I am not a certified auto mechanic, I have some experience with these vans but I faulted in advising you of the built in regulator for your vehicle....must have GM on my brain. Your vehicle does have the regulator built into the PCM. I was curious though if it is the PCM, if any other symptoms of a sick PCM are manifested or just the voltage problems. Go with the mechanic 100%, this vehicle needs to be placed on a diagnostic computer and the PCM run through its paces. Good luck to you...and sorry for the confusion.

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