Coach Batts overcharging

[freewill2008]

Fred - this is where geography and a very different coach from mine limit the
ability to help. I can give some general ideas.

One thought: Brand new components can be bad. Have you put a volt meter right
on the alternator + terminal? What does it read? If it is 20+ volts, look for
another regulator.

Unless you measure 20+ volts right at the alternator, the new regulator is doing
its job. In a 12V system, the charge voltage might be as high as 14.5, and the
resting battery voltage can be as high as 12.8. You you must ask yourself where
20+ volts comes from.

As I understand it, you have house and engine battery sets. Each battery set
should be grounded to the chassis, as are the coach components. There is a
total voltage potential of 25+ volts between the 2 battery banks. If a volt
meter somehow measures the total voltage potential across both battery banks
because a ground is missing somewhere along the line, you could see 20+ volts on
the meter. This same fault could possibly make the regulator think maximum
charge is needed, resulting in the high current reading.

Try reading from the + terminal of one battery set to the + terminal of the
other. Is the voltage above 12.8 resting or 14.5 with the alternator turning?
If so, there is most likely a bad ground that has eluded you. It is even
possible that the ground problem is internal to some component.

That is the view from 10,000 feet. The devil is in the details of how your
coach is wired. I think that a person with diagrams in front of them or someone
with extensive experience with your coach's electrical system is needed to take
this further.

It is late and I could be totally wrong. I often am

Bob Griesel

--- In WanderlodgeForum@yahoogroups.com, "Fred Hulse" wrote:
>
> Ground problem would make sense,
> but I am out of ground points to check!
> I don't know where else to look for grounds but will enjoy any suggestions.
> Thanks Bob
>
> Fred
>