Having problems with your Oldsmobile Alero ?

How do I check my alternator on 1999 olds alero. The voltage at the battery running or not is 12 volts. The voltage at the back of the alernator (large wire under insulating boot)when running is also 12 volts. Anything else to check before I spend $150 on an alternator? Thank you, Lou

Posted / edited by AnonymousUser on : 19-08-2019

Answers :

Start the car and let it run. leave it running and take the pos battery cable off...if it dies ur alternator is bad . if it stays running it usually means its good
Repair Help & Product Troubleshooting for Oldsmobile Alero

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