Yes , a car will run with a bad alternator……until the battery goes dead. Yes but eventually the car will die when the battery no longer has power to run the spark plugs and other systems. If you shut the car off , it will likely not start again without a jump start.
Considering this, what are the symptoms of a bad alternator?
6 Symptoms of a Failing Alternator
- The indicator light. It's quite likely that your vehicle is equipped with a warning indicator light in the dashboard titled "ALT" or "GEN."
- Headlights are dim or flickering.
- Other electrical failures.
- Strange noises.
- Car stalls or has difficulty starting.
- Battery dies.
Is it the starter or the alternator?
Higher electrical demands on charging systems have increased alternator failures. A starter that's failing may crank the engine too slowly for a quick start, or it may not crank the engine at all. Often, the problem is not the starter but a low battery or a loose or corroded battery cable connection.
Can a bad alternator drain the battery?
Defective alternator diode. A car alternator recharges the battery and powers certain electrical systems. If your alternator has a bad diode, your battery can drain. The bad diode can cause the circuit to charge even when the engine is shut off, and you end up in the morning with a car that won't start.