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Thread: Alternator question

  1. #1
    Junior Member
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    Ben
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    Default Alternator question

    So I'm finishing off my conversion (4ac-4age bigport) in my 86 but my battery isn't charging.
    I wired the 4age alternator plug to the wires from the 4ac alternator plug, but have now read that I should actually wire it to the wires off the old external regulator plug, is that right?
    I don't understand why wiring it to the old alternator plug doesn't work?
    can someone clear this up for me? Cheers

  2. #2
    Senior Member
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    Akio
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    Default

    the regulators on each version of 4age different and either internal or external.
    so from my very vague memory the 4ac plug and shit wont work with a 4age (or GZE one for that matter) as they different and have differing outputs?

    thats about all i can remember at this stage...

  3. #3
    Veteran willa's Avatar
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    Will
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    Default

    Thats correct. 4ac alternators have external voltage regulators (that black box to the right of your engine bay) and 4 age are internally reg'd. You have to rewire and eliminate that regulator. Not sure exactly how to but there should be a write up floating around.

    Will.
    SuperFunHappySliders

    SR's are ghey.

  4. #4
    Veteran Nikkojoe's Avatar
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    Default

    That is correct

    Read this:
    1983 AE86 ADM rust spec goodness track car build - end of the road
    1984 AE86 Silver ADM mk2 daily build - SOLD
    1984 AE86 ADM granny car daily now 4AGZE - SOLD
    1983 AE86 ADM Engine Conversion Slut - SOLD
    2002 IS200 6spd - new daily in progress
    1986 AE86 JDM GT-Apex Levin Notchback ready to roll......

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