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2003 chevy trailblazer rebuilt alternator but battery not charging message and battery lite coming on


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There are a couple possibilities for this problem.

First, check the Voltage output of the alternator.

If the battery has a bad cell it's not going to hold a charge, so replacement of the battery might be the solution.

If the alternator tests good 14.3v try replacing the battery.

If the alternator isn't putting out enough volts check the gray wire to the alternator and make sure it's intact.

The battery is only a couple

The battery is only a couple of months old, we replaced it earlier in the spring. The alternator also tests good. From what I have been reading this is a common problem but I have not been able to find a solution.


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