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Old 12-01-2012, 12:08 AM
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Alternator acting weird...

Hi guys,
I have an issue with my alternator. I have a 03 6.0 CC 4x4 SRW with a single alternator. For what I have read, its a stock 100 amps. I use my truck every 9 days for 5 days. So its sitting for 9 days. there is a rproblem with battery drain, so I leave the bateries disconected. The problem is that my Edge CTS shows that when I ran the truck, sometimes it reads 12.6-12.8V and after a while, or the next day, It reads no more than 13.8V, and always oscillating, even if I drive at 2000rpm steady for a couple of hours. I´ve been told that the brushes 8carbon things) may have wear out, or that I may have some oxidation in the alternator rotor. Any Idea what how to fix this? My truck has 262.000 kms...162K miles.
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Old 12-01-2012, 11:43 AM
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Replace it with a DC Power alt, they are much better than the little alt these trucks come with. 185 or 190 amp is what I would do, your alt may be the power drain I have seen that before. DC Alts voltage cut off is 14.8 volts so the vltage is in the 14v range usually.

Last edited by mhatlen; 12-01-2012 at 11:47 AM.
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Old 12-01-2012, 12:08 PM
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Either that or take it to a alt starter rebuilder and have it gone thru.
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