It'll run solely off the battery for a little while until the battery becomes too depleted. The check engine light will most likely come on, as well. This is, of course, provided the alternator doesn't seize when it goes out. If it does seize, your vehicle will either stall out, or it'll cause the belt to snap, which, if you have a serpentine belt, will disable your AC compressor and Power Steering.
THE BATTERY WILL GO DEAD
No, the alternator is used to charge the battery apperently.
You got a sh**ty car. replace it
your barrery will die eventually because alternator isn't creating power for the vehicle to run on
Usually, your car doesn't make ANY sound when your alternator is bad. When the alternator goes out, the battery fails to recharge, and you can't start your car. Another symptom: your headlights go dim at night. This usually happens just before your battery dies. Another one: your turn signals flash more slowly than usual. If it goes out in daylight, it just quits firing cylinders, running rough, intermittently firing, cutting out. Then it dies, and you don't have enough power to start the engine.
It goes faster
The battery will run down and he engine will stop. You will not be able to start the engine. The alternator keeps the battery fully charged.
Death and horrible destruction. Cars and trucks haven't used generators since the early sixties. However, if an alternator goes bad, the vehicle runs off the battery until the battery goes dead at which point the engine will no longer start or run.
the car won't start
Alternator is most likely going bad. Does your car start right back up after this happens? If your alternator is bad your car is trying to run on pure battery power and getting zero if little charge from your alternator. When this happens little by little your car will run out of power to everything and in turn shut off.
When the alternator goes bad or goes out completely, the car's battery will be drained. I suggest you pull the alternator and have it tested. If the alternator is bad, you will most likely need a new battery as well. The cost is around $200.00.
an alternator recharges the battery of your car