http://www.dodgecharger.com/forum/index.php/topic,33574.0.html Ammeter showing charge it means alt is sourceing back the batt to getting all the chemical balance. If you got a discharge, will demand be charged back like any device on car demanding juice.
If you have a charge reading is because batt got discharged sometime. If your alt is not able to source all the car ( at any RPM ) the batt will provide the juice the alt is not able to source, so got a discharge.
MOSTLY of constant charging readings came out because your car at iddle &/or low RPMs wasn't able to source everything and got discharge on those moments for long time.
You need to save the discharge much as posible to keep power sourcing balanced.
The ammeter reads what batt gains ( just because lost ) or loose ( because alt is not able to give ) IS NOT AN ALTERNATOR GAUGE, thats a missundertood created by most of the labels on clusters. Of course will give you an alt status reading, but just if you understand how to read it, but really is an STRAIGHT BATT STATUS READING
You don't get ever a discharged alternator, because the alternator is not an acumulator able to loose power.
there are many ways to understand this, but just one way to fix it if you pretend to keep the balance on your cars, and make it work like stock SAFELLY. If you change the charge system design, then there is another story
is pretty much normal get battery power loose on ANY car, DON'T BE AFRAID of get small ammounts of discharge readings, but try to keep them smaller and quicker as posible, to get it back charged again as soon as posible...
ammeters gives you an INSTANTLY status, voltimeters gives you a proportional "reflection" of the charge status.
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Someone want to explain how the ammeter showing + (charging) somehow means it is low on output?
If it showed - (discharging) then yeah.
everything depend WHEN is giving charge... revving up? any alt is able to feed all the car revving up, and even get back the juice to the batt... but what about iddling or low RPMs ? thats the reason why you are getting charge when revving up, because your alt is not powerfull enough when spinning low
