Electrical gremlin

The alternator provides the necessary power to run the car. Battery is there to carry the intermittent loads and is replenished by the alterntor.
Ammeters arent useless, but are limited to what they do.
Voltmeter shows voltage before,during and after starting a vehicle, making it a diagnostic tool for the battery,starter and alternator.

i was bypassing ammeters before the internet told me to.