Here's why:
* The alternator is the primary source of electrical power for the car while the engine is running. It charges the battery and powers all the electrical components like headlights, radio, power windows, etc.
* Without a functioning alternator, the battery will slowly drain. Eventually, the battery will have insufficient power to start the engine.
* Even if the car starts, it will likely stall soon after. The engine requires electrical power to run, and without the alternator, the battery will quickly run out of juice.
However, you can drive a car for a short distance without a functioning alternator if the battery is fully charged. This is because the battery will have enough power to run the essential systems for a short period. However, you should not drive for extended periods or attempt to start the car again if the battery dies.
If your alternator is not working, it's crucial to have it repaired or replaced as soon as possible to prevent further damage and ensure safe driving.