There will be very little charge on the ammeter if the battery is fully charged. The best way to check it is with a voltmeter. It should run up to about 7 volts when you rev the engine a little. You can check it with the dash gauge. Turn on the lights &/or other acessories & rev the engine. The gauge will show discharge at idle & come back up to charge when you rev the engine. If it stays at discharge you have a problem with the charging system.
