Assuming that my understanding of the function of both of these gauges is correct...
also why do ammeters show positive and negative figures.
All questions that would not need to be asked if I had grown up around cars that had more dials than a speedo and fuel gauge.
- Ammeter will show current usage, i.e. with A/C and headlights on, current draw will increase resulting in a higher drain on the alternator and resulting in engine out put shifting from turning the wheels to turning the alternator
- Voltmeter shows either voltage on the battery or output of alternator depending on running state of the engine.
also why do ammeters show positive and negative figures.
All questions that would not need to be asked if I had grown up around cars that had more dials than a speedo and fuel gauge.