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Thread: Alternator Voltage

  1. #1
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    Default Alternator Voltage

    I think I may have an issue with my alternator with the bearings on their way out and it making a high pitched noise all the time. I have checked the output of the alternator and it is only kicking out 13.9v is this normal for the vectra, i'm used to cars that produce more around 14.6v. It is charging the battery enough, its not struggling to start etc but other peoples figure will help me before I try and claim a new alternator on warranty.

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    Regular Member DaveW555's Avatar
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    It may not be the bearings in the alternator it maybe the clutch pulley has seized up causing the noise, as for the voltage it should be putting out about 14.4v but if its charging ok and you've never had any problems starting etc its probably nothing to worry about.

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