Voltage Drop hot outside

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firebane

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Been a lurker around here for awhile but figured I'd ask this question as I've never seen it happen before.

If its cool outside and not very hot my voltage guage will read an average of 13.5-14v. But if its hot outside like its been lately +30 Celsius my voltage drops down to like 10-11v instead.

Now I'm thinking the alternator is taking a crap, but that would make much sense as when its cool its fine.

So I'm thinking either battery or alternator?
 

grnrpr68

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take it to the local parts store and have the charging system checked out to see what it is
 

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