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Thread: Repeat Dead Batteries

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    Repeat Dead Batteries

    Probably a dumb question and kinda new so here goes.

    ‘16 Laramie CC MM3 tuner.

    Truck sat for 3 days with less than a year old batteries 20 degrees and no juice.

    Same thing happened about a month ago.

    Load tested batteries and they tested fine.

    I’ve read/heard that unplugging mm3 from obd-2 port would likely help.

    Thoughts?

    Last time I put the charger on it for a few hours and fired right up no issue.


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    Re: Repeat Dead Batteries

    Quote Originally Posted by BSegar45 View Post
    Probably a dumb question and kinda new so here goes.

    ‘16 Laramie CC MM3 tuner.

    Truck sat for 3 days with less than a year old batteries 20 degrees and no juice.

    Same thing happened about a month ago.

    Load tested batteries and they tested fine.

    I’ve read/heard that unplugging mm3 from obd-2 port would likely help.

    Thoughts?

    Last time I put the charger on it for a few hours and fired right up no issue.
    Unplugging the mm3 at the obd port isn't a bad idea if the truck sits.

    My truck is never drove and I keep trickle chargers on mine year round.

    I recommend the Noco 2a if charging them individually or the Noco 5a if only using one.

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