How To Check If My Alternator Is Charging. If the charging circuit connections are good continue with the following tests. Have your assistant start the cars engine and let it run for a few minutes at 1200 RPM.
The following video gives you a charging system check overview that you can follow as well to test your charging system if necessary. When you start up your car look at your interior lights. WHY MY ALTERNATOR QUIT WORKING HOW TO FIX ALTERNATORIf your alternator is not charging and you want to know the number one reason why alternator is bad on a.
Step 1 Check the Alternator Gauge.
The first step in monitoring your alternator to check the levels is to check the alternator gauge itself. If the charging circuit connections are good continue with the following tests. While your car is running disconnect the positive battery cable. There should be 136 to 143 volts showing.
