Re: TOY: alternator

[Thom Singer <ntsqd@xxxxxxxxx>]

If the light is going out, then the field is energizing and the alt is
back-feeding (charging) that wire. Since it's taking more and more RPM
to charge I guessing that the field exciter voltage is falling off.
Have you tried replacing the regulator ? If that had no effect, check
the entire length of the field wire, sounds like it is slowly getting
cut or mashed by something. Somehow the field wire is increasing it's
resistance thereby reducing the exciter voltage which in turn requires
more RPM to produce power.

--- Mike Carter <thecarterman@yahoo.com> wrote:
> A couple of other things you may want to check for are
> open or shorted circiuts in your rotor and stator. But
> given your description, I don't think that is the
> case.
> 
> -Mike Carter 
> 
> 
> --- Charles Kearney <ckearney@cicada-semi.com> wrote:
> > Last week I asked for help about my alternator.
> > As per suggestion.
> > I decided to change the brushes.
> > I tested the alternator before changing
> > the brushes at an auto parts store. It wasn't
> > charging.
> > After replacing the brushes, it worked fine.
> > Put out 14 volts at all rpms.
> > 
> > Today it quit charging at low rpms again.
> > 
> > It is exhibiting the same signs as last
> > week.  Not charging but the idiot light goes
> > off above a certain rpm.  That rpm is steadily 
> > getting higher.  At first it would go off at 900 rpm
> > now the light goes off above 1200 rpm, and climbing 
> > daily.
> >  
> > 
> > It do not think it is the wiring because 
> > the alternator was not charging when I 
> > took it out of the truck.
> > 
> > I am at a loss.
> > 
> > 
> > Charles
> > 
> > 
> > 
> > 
> > 
> > 4x4Wire.com Toyota Section
> http://www.4x4wire.com/toyota/
> 
> 
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=====
TS
Ventura, CA

"Teach you all I know and you're still stupid."
-- Howdy Lee

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