How To Test If Alternator Is Bad Without Multimeter. There are many ways to test if your alternator or battery is bad when your car dies unable to start or there is a warning indicator light on your dashboard. Checking for a Bad Diode.
An illuminated dashboard light can indicate a problem with an automobile charging system. If you have. Using a Multimeter to Test a Car Battery Set the multimeter to 15-20 volts.
If you just got a brand new battery and your car is not starting then you definitely have a faulty alternator on your hands.
Your volt meter will tell you if the alternator. If you have a newer battery but your car wont start you may have a bad alternator. This ON CAR TEST doesnt require any tools such as a multimeter or anything else. Below are some alternator tests and clues to look for if you dont have a multimeter handy.
