Browse over 9,000 car reviews

    guides

    adventureguide

    evguide

    familyguide

    tradieguide

    urbanguide

    0 Logout

    Browse over 9,000 car reviews

    The alternator in my 2021 Mazda BT-50 isn't fully charging the battery

    Mazda Mazda Advice Mazda BT-50 Mazda BT-50 Advice Mazda BT-50 2021
    ...

    The alternator in my 2021 Mazda BT-50 will not fully charge the battery.

    Answered by CarsGuide
    30 August 2024
    David Morley

    There’s a very simple check you can do to see whether the battery or the charging system (alternator, regulator and wiring) is at fault here. With the engine running, place the probes of a multi-meter (switched to measure voltage) on the relevant battery terminals. If you see a figure of anywhere between 13.2 and 14.7 volts, the charging system is doing its job. You might need to rev the engine slightly off idle to see these numbers, but the voltage going into the battery should be in that range.

    At this point, the battery becomes the main suspect, and a worn out battery will often neither hold a charge nor accept one.

    Disclaimer: You acknowledge and agree that all answers are provided as a general guide only and should not be relied upon as bespoke advice. Carsguide is not liable for the accuracy of any information provided in the answers.
    Other Mazda BT-50 Problems
    SELL ALL MAZDA BT-50 PROBLEMS
    Related cars for sale on CarsGuide
    See more Mazda BT-50s for sale

    Comments

    Have a new question for the CarsGuide team?
    More than 9,000 questions asked and answered.
    Ask now
    Complete guide to Mazda BT-50 2021
    Complete guide to Mazda BT-50 2021 CarsGuide Logo
    Reviews, price, specs and more