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Old 01-26-2013, 07:02 AM
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Batteries.

I'm monitoring my voltage through my CTS. My volts when I KOEO are 11.5. After if fires up, they jump to ~13.7. I can run for however long and whe. I shut the truck off, the batteries are back down to 11.5. My thinking tells me the batteries are bad, and not holding a charge. The alternator is ok, or it wouldn't put up 13.7 when I'm running. But, I'm far from an expert on this system. Sound right to you guys?


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Old 01-26-2013, 07:04 AM
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Your gauges are telling you what to do. I would just put a volt meter on them and double check. But more than likley they are bad.

Get some new ones! I nice set of 850CCAs!
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Old 01-26-2013, 07:08 AM
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Batteries.

Yeah. I'm going to the parts store in a few and have them tested out. I've about rebuilt this truck after I bought it! But, it should last me a long time.


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Old 01-26-2013, 07:42 AM
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if your near any truck dealerships you should try pricing batteries there. the local parts places here wanted $100-150 per battery for 850CCA. i got two 1000CCA batteries from the local international dealership for $100 a piece. there a little taller, but didnt have any contact with anything. warranty was the same or better then some parts stores also. with higher CCA and less $$.
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Old 01-26-2013, 07:46 AM
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Batteries.

Good idea too. Thanks


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Old 01-26-2013, 08:59 AM
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Batteries.

I had them tested and they were fine. Putting out over 13v. I guess the CTS isn't seeing it correctly in the KOEO position.


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Old 01-26-2013, 09:05 AM
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Re: Batteries.

Did they isolate the batteries when they load tested them? I don't trust the results.

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Old 01-26-2013, 09:09 AM
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i went thru this a year ago i found out that the cts is showing a lower reading what i was told to do is put a volt meter at the batteries and i got almost a volt higher then what the cts said it was. my cts said 11.3 but when i put a volt meter at the batteries it was 11.9 and when it was charging the cts said 12.9 but the volt meter said 13.4. I used two different volt meter for this
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Old 01-26-2013, 10:47 AM
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Batteries.

Yes they isolated my batteries. My wife's uncle runs an autozone and I trust him. After I fire it up sometimes it'll read high 11s for a little bit, then instantly shoot to 13+. I'm thinking the CTS is having an issue with this one.


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Old 01-26-2013, 10:58 AM
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Re: Batteries.

Maybe, have you updated your CTS? The low voltage then jumping to 13 + is glow plugs continuing to draw then shutting down. I can see my headlights get brighter when my voltage jumps.

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