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Charging issue? Belt tensioner, perhaps?

3212 Views 15 Replies 7 Participants Last post by  Steve83
I'm unable to drive faster than 60, without the battery light coming on.

Battery voltage: 12.4 / 12.5 - Passenger / Driver side.

Not yet tested the output of the alternator.

Seems odd the alternator would/could function properly unless I race the engine, or run +/- 1900 RPM (about 60 mph), triggering the battery light to come on, as well as the voltage gauge to drop very low.

I suspect the belt tensioner is calling it quits.

Am I on the right track?
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I have had a number of alternators that would work quite fine under a certain RPM but go over that RPM and suddenly there is no charge, which sounds just like what yours is doing. A new or a good rebuilt one should fix you right up.
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