How to Test an Alternator

Diagnosing Alternator Problems. Learn how to test an alternator with a Multimeter. Does your car not start, do you have dim headlights or interior lights, does the starter sound weak when start the engine, or does your car die sitting overnight? This video will show you a few ways to test your alternator to see if it is bad, is going bad or is good. A good alternator will show a charge at around 14.2-14.7v while the car is running and under an electrical load it wont drop below 13v. Here is a great multime

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