grand am alternator hum

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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=7272
Printed Date: May 05, 2025 at 2:54 PM

Topic: grand am alternator hum

Posted By: allthumbs
Subject: grand am alternator hum
Date Posted: December 28, 2002 at 12:17 PM

Help!! 1986 Grand Am died while being driven. No spark. replaced cap, rotor, plugs, wires, pick up coil. started and ran for 10 minutes. Died again. noticed a hum from the alternator with key on. disconnect alternator, car starts and runs fine, connect alternator = hum but will not start. any ideas???

Replies:

Posted By: SOUND PRESSURE
Date Posted: December 28, 2002 at 10:06 PM

Change out your alternator. If you have an AutoZone near you they can check it at no charge. At the same time they can check your battery, and starter.

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Sound Pressure

You know you have the right amount of pressure when your eyes start to water! Now you've got Juice!

Posted By: SOUND PRESSURE
Date Posted: December 28, 2002 at 10:13 PM

You might have a bad control module. If so it's a $26 part.

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Sound Pressure

You know you have the right amount of pressure when your eyes start to water! Now you've got Juice!

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