How Do You Know When Your Car Alternator Is Bad. If your car doesnt start or isnt running at full power it may be your battery. Try jump starting your car to see if a boost helps it to start up.
A whining or grinding sound coming from your alternator while your car is in operation is a bad sign. Odd sounds Usually you wont notice odd noises like rattling as the primary symptom of alternator failure. Some of the things to look for are no-starting and trouble starting dimming lights and problems with stereo system output.
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Once the output is within range the light remains unlit. If your car doesnt start or isnt running at full power it may be your battery. Thats the story with a lot of car parts but the alternator is especially important because it powers anything that needs electricity in the car. If your alternator goes out your car isnt going anywhere fast.
