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    becanfield's Avatar
    becanfield Posts: 1, Reputation: 1
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    #1

    May 3, 2010, 08:25 AM
    Battery light comes on
    The battery light comes on occasionally when driving; 7.3 liter diesel ford
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    May 3, 2010, 08:56 AM

    Your PSD requires two strong batteries. Remove and fully charge both batteries, adding distilled water if necessary. Most auto parts stores will charge batteries for free.

    Afterwards, check the overall health of the charging system with a multimeter:

    https://www.askmehelpdesk.com/cars-t...ml#post1973613

    The battery light coming on may indicate the brushes in the alternator are worn and need replacing--easy job on some Motorcraft alternators.

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