[jbrewer]

It's going to be hard to diagnose without a meter....

The ammeter will probably deflect to the left a little bit whether the battery is fully charged or not... it's indicating not the state of the battery, but the flow of current. With the key on, there's likely some drain that is normal without the engine running....charged battery or not. The only difference with a low battery, is that there may be less current available to flow (and deflect the meter) with the key in the same condition.

You might make sure the ground (-) terminal of the battery cable is secured to the frame at a CLEAN point... remove the bolt and sand or otherwise make sure that the connection to the frame is an electrically good one.

...and borrow a meter! :-)

John