Generator charging question

[freewill2008]

Gary - Given that the wiring on your bus is original and stock, the
genset +charge comes from one side of the charge isolator and goes
directly to the genset battery. There are 3-4 connections but no
control boxes or other components after the charge isolator.

There should be a small voltage drop due to the charge isolator, but
still plenty of voltage to charge the genset battery.

If all the +12V wiring and connections have been checked and found
good, then start checking grounds. Ground connections are the other
half or the 12V system and just as likely to cause problems. In the
generator compartment, follow the ground cable from the battery to
the bus frame and the generator engine. Take each connection apart
and make sure everything is "shiny clean". Also consider that lugs
on the ends of cables can have high resistance after 25 years. Twelve
is a very low voltage for an electrical system and it does not take
much resistance in a cable lug or connection to cause a voltage drop.

Bob Griesel '84 FC31 WLII WA

--- In WanderlodgeForum@yahoogroups.com, "hippieforever3"
wrote:
>
> I've looked at the charging system diagrams and if I interpret them
> correctly the way the generator battery gets charged is either from
the
> alternator or the generator produces AC which than goes to the
> converter and this indirectly charges the generator battery.
>
> I never seem to be able to get a full charge on the generator
battery
> either off the alternator or the converter. Unless I'm missing
> something the generator will always get charged to one diode drop
less
> than the main battery bank. I think I see evidence of this when I
hit
> the Aux. Battery switch and the dash voltage meter drops about one
half
> volt.
>
> Does the charging voltage come into the generator compartment
through
> the "mystery control box"? or go direct to the battery. What is in
that
> box? Awful big for just a fuse holder and start switch.
>
> I know I can trace it all out but if someone happens to know, I can
> save getting a bad back stooping over for a few hours.
>
> Regards,
> GPSGary
> 1984FC35
>