My car does the same thing. I've always guessed that the alternator's
internal voltage regulator doesn't kick in until the alternator turns at
a higher rate than idle RPM.
Eric Zambori
Fred Cheney wrote:
>
> Good afternoon,
>
> As usual, I have come across another strange thing with my MGB. When I
> first start the car and let it idle the red alternator light remains
> lit. The light does not go off when I race the engine slightly. When I
> turn on the headlamps the light goes off. Any ideas?
>
> Fred Cheney
> Kinney & Associates, Inc.
> fcheney@kinneyassoc.com
> (518) 266-9100 x131
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