67 Dart Conv. - No Tail Lights, Park Lights, Flashers

Mopar_Parr said

Not sure how to check the ammeter for flow. Is it simply looking at the gauge with the needle right of center towards the charge side?

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The other way. The needle should move a little to the left of center toward discharge.
The ammeter shows
D for battery discharge.
C for battery charging.

So why is the gage labeled 'Alt' when it really shows current to or from the battery?
If the battery is discharging when driving, then the engine is running on battery and something is wrong with the alternator or alternator circuit. So in a round about way it informs us about the alternator operation.