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Charging system fault????

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Old Jul 11, 2006 | 12:50 PM
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Default Charging system fault????

I have a 98 Vert and Charging System Fault has come up on DIC 4 times now then goes off. I checked the battery charge on the DIC and it goes from 12.4 to 13 at 600 RPm and at 2000 rpm it reads 13.3 or 4. The belt is good and it seems tight. Any ideas?????
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Old Jul 11, 2006 | 02:54 PM
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check to make sure that the battery connections are tight
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Old Jul 11, 2006 | 08:46 PM
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Default I've also got this on the DIC

comes up about twice a week now in the am on first start only. Any ideas?
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Old Jul 11, 2006 | 09:02 PM
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Did you upgrade your alt.?
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Old Jul 11, 2006 | 10:39 PM
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Default No upgrade

Stock alt. Is it going, does it bring up a code?
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Old Jul 11, 2006 | 10:59 PM
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Has the alt ever been replaced at a dealer. The new part number is a higher amperage unit and can cause the charge system fault message.
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Old Jul 13, 2006 | 08:23 PM
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Default Never replaced

coming up on 65k miles. Maybe it's expired. Got the msg again today..
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Old Jul 13, 2006 | 09:05 PM
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Default Charging system fault????

Originally Posted by MILESTONE#001
I have a 98 Vert and Charging System Fault has come up on DIC 4 times now then goes off. I checked the battery charge on the DIC and it goes from 12.4 to 13 at 600 RPm and at 2000 rpm it reads 13.3 or 4. The belt is good and it seems tight. Any ideas?????
Mystery. I get the same message only after the car sits for a couple of days. Battery good, voltage checks good, grounds are good, et. Clear codes, if any, and good to go until it sits for a couple of days.

Annoying! Must be a thing with the PCM. Likes juice on regular basis!

2002 Z06
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Old Jul 13, 2006 | 09:33 PM
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Have a 98 vert myself. ... had the same problem with mine. the large red wire that comes off the back of the alt goes to the starter and hooks up with the batt wire there...I found that the nut that holds the alt and batt wires on to the starter was a little loose..took the wires all the way off and wire brushed the conections and then reinstalled the wires....have not had a problem since.

Hope this helps.



Jack
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