HELP: Dead batteries that are brand new - Chevy and GMC Duramax Diesel Forum
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Old 11-16-2011, 08:00 AM   eBay Motors  #1 (permalink)
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HELP: Dead batteries that are brand new

Hello all, I have a 2006 duramax and a few weeks ago I come out and when I turn the key over it just clicks. Okay so I assume it's batteries. So I go and buy two brand new batteries and all has been well up until today.I noticed the past few days when I first start the truck the battery voltage seems to about around 10-12and once I start driving it goes up to past the 14 volts mark. Well I go out this morning to start and they are dead again, just clicks. What in the world could this be? I don't have an aftermarket cd player or anything.
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Old 11-16-2011, 08:16 AM   eBay Motors  #2 (permalink)
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You could have a bad alt....do a load test on it....could be a module not properly going to sleep and leaching power as well.
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Old 11-16-2011, 08:17 AM   eBay Motors  #3 (permalink)
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Mine sat for 2 days and I came out and just clicks. Service brake system flashing on the DIC. Charged em up and load tested them and it said the batteries are fine?

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Old 11-16-2011, 08:18 AM   eBay Motors  #4 (permalink)
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I thought about the bad alt as well, no CEL's or anything that come on, I'm going to attempt to jump it and go to a parts store and see if they can test my alt.
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Old 11-16-2011, 08:22 AM   eBay Motors  #5 (permalink)
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If you charged them up and then load tested them it self defeats the point of testing them.

Do you start your truck after you charge the batteries? No... you start your truck after it's sat for awhile. So try letting them sit (not on concrete btw) for a few hours and then come back and put the load tester on them.

At least that's how I always tested mine, if the symptoms are that of a dead battery and the charging system is up to par.
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Old 11-16-2011, 08:24 AM   eBay Motors  #6 (permalink)
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Quote:
Originally Posted by Chad3304 View Post
I thought about the bad alt as well, no CEL's or anything that come on, I'm going to attempt to jump it and go to a parts store and see if they can test my alt.
More than likely it's not your alternator... if your volts go up to 14 with the truck running (and you verified this with a multi-meter... not the inaccurate analog gauge on the cluster), then your charging system is most likely working. If you were running off your batteries, it would be at most 12VDC

Did you check to make sure your battery connections are clean and tight?
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DiamondEye 4", EFI Live by BobO, Edge Insight CTS, S&B Intake, Bilstein 5100 shocks, MOOG idler/pitman with SS support, Raptor 150, P553207, !PCV, !EGR, Transgo Jr, Rare Parts tie rods, 55 watt 4.5k HID low/hi/fogs, Belltech 3" lowering shackle
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Old 11-16-2011, 08:24 AM   eBay Motors  #7 (permalink)
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Dont own a load tester. Just dtove it to the autoparts store. Do you have to disconnect the batteries from each other since there parralleled?

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Old 11-16-2011, 08:27 AM   eBay Motors  #8 (permalink)
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Okay im confused because I don't know if the replies are towards me or the other guy with battery problems, no offense would have been easier had he started his own thread. But to dan I used the gauge on the cluster for my readings. It was around 12 and stays there until I drive a little then it goes up?
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Old 11-16-2011, 08:34 AM   eBay Motors  #9 (permalink)
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Quote:
Originally Posted by Chad3304 View Post
Okay im confused because I don't know if the replies are towards me or the other guy with battery problems, no offense would have been easier had he started his own thread. But to dan I used the gauge on the cluster for my readings. It was around 12 and stays there until I drive a little then it goes up?
Sorry just looking for help as I put a thread up and posted in another battery problem thread with 0 replies. Seems were having the same problem?

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2006 Chevy LLZ
ReadyLift|EFI Live tuned by DDP|Autometer|
AFE|MBRP|RBP|PPE|Transgo Jr|Cognito|AVS|WeatherTech
Waiting install:cab lights, building traction bars, Airdog, ATP Autocal!
Thanks ATP,ADP, & MA
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Old 11-16-2011, 08:36 AM   eBay Motors  #10 (permalink)
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no problem man, yeah I just went back and read your first post it does seem to have the same problem so might as well stick to one thread lol.
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