Re: [FWDLK] Generator or voltage regulator

[William Huff <whuff@xxxxxxxxxx>]

I think on a 12 volt system you should expect to see around 14 volts 
when charging properly.  Anything much higher, say 14.6-15 volts can 
lead to battery boiling and other problems.  Without a higher voltage 
than the battery being generated by the generator, no charging will 
take place.

Checking an alternator is a lot easier than diagnosing a generator, 
but for a beginnineg start with a fully charged battery and measure 
the system voltage.  Then put a load such as the headlights on and 
measure the voltage.  The voltage at the generator should rise over 
time with the load.  The FSM is really a good thing to have when 
doing this work.


Bill Huff


At 9/8/200908:35 PM, Eastern Sierra Adjustment Svc wrote:
> Maybe-certainly someone else will jump in, but, it is my 
> understanding that the am(p)meter
> reveals the health on the generator and the voltage regulator, and 
> that the volt meter records
> the health/output of the battery.
>
> Neil Vedder
>
>
> Nick Sperduto wrote:
> > I can't find my shop manual it's misplaced somewhere in my mess of a garage.
> > My 56 plym is only charging about 12.8 volts at high rpm.
> > Is there an easy way to tell if it's the generator or the voltage regulator.
> >
> > Thanks,
> > Nick
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