Is it true if I take the cord off the negitve side of battery n it dies, dose that mean my alternater is bad

  • Welcome to the site. No, it does not necessarily. Depending what vehicle you are working on, some damage can be done by doing so. If you edit your question to add details about the vehicle, we can try to give you a specific answer. – CharlieRB Apr 5 '18 at 12:51
  • A search gave this question and answers : mechanics.stackexchange.com/q/33706/10976 – Solar Mike Apr 5 '18 at 14:52

Depends on the specific car. The best way to diagnose it is to take the car to a parts store of your choice (or even a Walmart tire department). They have equipment to diagnose whether it's the alternator, battery, or (frequently) both.

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