Here's why:
* The alternator provides power to the car while the engine is running. This is why you can disconnect the battery and the car will keep running.
* However, disconnecting the battery cable will also disconnect the alternator from the battery. This means that the alternator can no longer charge the battery.
* If the alternator is bad, it's likely not charging the battery properly anyway. So disconnecting the battery cable won't make much difference in this scenario.
What will happen if you disconnect the battery cable with a bad alternator:
* The car will continue to run for a while. The battery will have some charge remaining, and the alternator will continue to supply power to the car.
* Eventually, the battery will run out of charge. The car will then stall.
Here's what to do if you suspect your alternator is bad:
* Don't disconnect the battery cable while the engine is running. This can cause damage to the electrical system.
* Have the alternator tested by a mechanic. They can determine if it's functioning properly.
* If the alternator is bad, replace it as soon as possible.
Important Note: Even if your car continues to run after you disconnect the battery cable, you should still have the alternator checked. A bad alternator can cause a variety of problems, including:
* Dim headlights and taillights
* Slow starting
* Electrical problems
If you are experiencing any of these issues, it is important to have your alternator checked as soon as possible.
