low voltage output until engine is revved

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  • Alistair C
    S2Forum Maniac
    • Jul 2003
    • 693

    #16
    Well my new regulator was a Bosch one from the stealer.
    Tuesday it stopped charging altogether.

    Checked the output on the blue wire at the alternator (+10.5v)
    Checked the Cluster by swapping for another unit - (no difference)
    Checked the 'Exciter' circuit in the alternator with a +12v supply with test lamp - (no current flow).

    Came to the conclusion it could only be duff alternator.
    Bosch main agent -- £97+VAT exchange

    Job done!
    Nearly +14v with engine running, starts charging on startup & battery light comes on with electrics as its supposed to.

    Fingers crossed that'll be my electrics issues sorted for a couple of weeks!

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    • SteveH
      Super Moderator
      • Jul 2003
      • 4460
      • Country: United Kingdom

      #17
      Glad to hear it's sorted
      91 Modded 3B
      14 A6 Avant Black Edition

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