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Old 10-31-2012, 02:00 PM
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Electrical Help!

Hey guys I have an 05 ccsb w/102xxx miles and I just changed the batteries this morning and my CS is still pulling 13.1 to 13.4V instead of 13.8 to 14v like it should. I also changed out the plug in the back of the alternator with the same results. Was wondering is this normal? before cranking volts are at 11.5 to 11.7 and once I step on the gas they go back up to 13.1 to 13.4 no higher. Could my alternator be going bad? Thanks Chris
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Old 10-31-2012, 05:13 PM
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Yes your alternator could be a problem, although your voltages look fair. I see, 13.6-14.1 while running. Just keep an eye on it.

Sent from my phone that somebody didn't help me get.
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Old 10-31-2012, 08:31 PM

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my voltages sit around the 13.5 range. I used a DVOM (Digital Volt Ohm Meter) and checked the voltage at the alternator with the engine idling and got 14.5 at the alt., checked the batteries and it's in the 13.5 range. That means I have a voltage drop of 1 volt between the alternator and the batteries. most likely due to corrosion where the wire connects to the battery clamps, and where the wire connects to the alternator. Sounds to me like your is most likely the same cause. you can try cleaning the ends of the cables, where it connects to the battery clamps, and where it connects to the alternator and that will 100% of the time fix it 80% of the time
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