My 82 DV with the Bosch AL33X 90 amp alternator does the same thing.  And
the tach hooked up to the 'W' terminal doesn't read until a good rev turns
the light is off.

Jonathan

Bluehighwayvanagon.blogspot.com

On Thu, Oct 4, 2012 at 8:28 PM, Richard A Jones <Jones@colorado.edu> wrote:

> I find that 'most' waterboxers either take no rev to get charging started,
>> or just a slight one.
>> I find that on an 82 DV with 65 amp alternator ..it takes quite a good
>> rev to get it to start charging.
>>
>
> Yup, my '81 always requires a bit of a goose to turn off the light.  It
> always has since I bought it in January '82.  My '87 never does.
>
> Richard
>