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1g Alt wont charge battery

Posted by Dsm alaska 907, Jan 17, 2021

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  1. Dsm alaska 907

    Dsm alaska 907 Probationary Member

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    Joined Jan 16, 2021
    Sutton, Alaska
    So i just got this 92 talon tsi awd and the alternator won't charge the battery, yes im sure the alternator is good. The 80 amp fuse is good in the fuse box. The battery light on the dash is on and had some messed up wires coming off the alternator, and the battery is relocated to the trunk. Any suggestions? I was thinking about redoing the wiring for the battery relocation but I'm not sure if thats the problem.
    Anything helps im out of ideas!
     
  2. Dsm alaska 907

    Dsm alaska 907 Probationary Member

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    Joined Jan 16, 2021
    Sutton, Alaska
    Forgot to mention it also breaks up in boost
     
  3. motomattx

    motomattx Proven Member

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    1,181
    Joined Dec 9, 2010
    wampum, Pennsylvania
    If its not charging its likely going to break up, fix the charging issue first before biting off any more. I suggest that you run all new wires to the battery from the fuse box and a new wire from the fuse box to the alternator, AND you need a fuse at the battery so that you dont burn the car or anything else down.
     

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  4. Dsm alaska 907

    Dsm alaska 907 Probationary Member

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    Joined Jan 16, 2021
    Sutton, Alaska
    Is that all the charging system really is in these cars? Alternator to the fuse box where the 80 amp fuse is then to the battery?
     
  5. Vegas Smith

    Vegas Smith Proven Member

    4,204
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    Joined Dec 2, 2002
    Houston, Texas
    Yeah, that sounds about right. Also, the charging system won't work if both the alternator relay (in the left-side fuse box) and the charge light in the dash are messed up. It will charge if just one of those works.
     

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  6. steve

    steve DSM Wiseman

    13,643
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    Joined Feb 3, 2002
    Boulder, Colorado
    The FSM suggests that if the charging indicator in the gauge cluster fails to turn off once the engine started to check the IC Voltage Regulator inside the Alternator. (which usually means replace the Alternator)

    1GAlternator.PNG alt1.jpg
     
    Last edited: Jan 18, 2021

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  7. Dsm alaska 907

    Dsm alaska 907 Probationary Member

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    Joined Jan 16, 2021
    Sutton, Alaska
    Thank you guys ill look into this after work open to all suggestionsh
     

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