Port Batt.not charging

Discussion in 'Sport Cruisers' started by Dream Catcher, Sep 15, 2019.

  1. Dream Catcher

    Dream Catcher New Member

    Nov 11, 2016
    New Salem NC
    310 Sundancer 2010
    Twin 350 Mags w/bravo III drives
    Have a 2010 310 Sundancer with twin 5.7 , Batt. are 1-year old, not charging Port Batt. from alternator or on board charger, is there a relay ?
  2. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    How have you verified that it's not charging?

    Which port battery? Are there not two port batteries?

    Do you have the battery charger breaker/switch turned on (main DC breaker panel)?

    Could be a ground issue on the port bank.
    Last edited: Sep 15, 2019
  3. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
  4. dvx216

    dvx216 Well-Known Member SILVER Sponsor

    Feb 1, 2012
    Catawaba Island,Oh.
    2000 310 sundancer 5.7

    twin 5.7 300 Hp.
    First off check connections positive and negative with the battery.When the boat is running does the volt meter on the dash show around 14.5 volts? Check the batteries cell see if their dry if it is a wet battery if it is dry it's likely you had a short in the battery now it's open and will not charge.Remove the leads off battery in question take a voltage reading at the battery if there is zero volt on it it will not take a charge because a completely dead battery has no resistance there for it is a open circuit. A battery shop can check the battery and if it is still good they can get a completely dead battery charged again. The reason I'm leaning towards the battery or a bad connection is that its not charging on shore power or the alternator.

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