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Old 04-19-2012, 10:38 PM   #1
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Any ideas?</span><br style="font-size: 13px; line-height: 17px; : rgb231, 234, 239; ">The original 2004 Dodge Ram 2500 Batteries failed me a few days ago. So, yesterday I replaced them both and now when the ignition tries to initiate the heater grid relays located near the passenger’s side battery continuously chattering.</span><br style="font-size: 13px; line-height: 17px; : rgb231, 234, 239; ">Thank you in advance.</span><br style="font-size: 13px; line-height: 17px; : rgb231, 234, 239; ">Kamper Dave</span>



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Old 04-19-2012, 11:09 PM   #2
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If you pulled them both at the same time then installed two new ones(batteries)I would pull the negative lead on one battery for 15 to 30 minutes then reinstall it and reset everything. If you installed them one at a time then you might want to reseat the grid heater relays. It sounds like the ECM needs to be reset which pulling one negative battery lead should do.
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Old 04-20-2012, 02:12 PM   #3
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ECM will not reset or communicate. After 7 hours of

searching for a problem I called for a tow truck. It looks as though the ECM

died. I have never had a dead battery before. I guess low voltage was more than

it could bear. I’ll bet the bill will be more than I can bear.



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Old 04-20-2012, 09:53 PM   #4
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Dave, that was basically what happened to mine when I pulled both the old batteries at the same time and then installed the new ones. Only mine did not die it just lost part of it's programming. After a tow truck ride to the dealer they reprogrammed it and it was back to normal. I was lucky and it happened while I was still in warranty and they covered it.
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Old 04-20-2012, 11:47 PM   #5
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Hunter,</span>I'm glad that they could fix yours.</span>Wouldn’t you know it? Our Chrysler Bumper to

Bumper Warranty expired last year.</span> This charge may be $2,000.00 plus. Thank

heavens we got a good deal when we purchased the truck.</span>Kamper Dave
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Old 04-21-2012, 02:25 AM   #6
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That stinks, Maybe you will get lucky and it wont be as bad as your thinking. Low voltage is not a good thing.

Is this your first set of batteries ? We replaced ours at least two years ago and they were over due but our truck sits for long periods of time.
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Old 04-21-2012, 05:46 AM   #7
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I've wondered about replacing the batteries. I've got a 2005 with 45K miles on it and original batteries. Spends a lot of time in the garage. Do I just wait until it starts to crank slow, or do some preventive maintenance to prevent being caught out in the middle of nowhere (not that I visit that region frequently)?



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Old 04-21-2012, 09:17 AM   #8
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These were the original batteries from 2004. We keep the Battery Minder on these batteries all winter and whenever it is inactive. I had noticed after removing the Battery Minder for a week that she didn't turn over as fast or start as quickly as before.
The evening that thing went bad I used the Battery Minder Condition Tester on the electrical system and it wouldn't even light up. I should have just put the charged back on the batteries. Hind-site is always 20-20.
It sure seems that low voltage or removing the batteries on these old ECMs may be a problem. I wish now that I would have left the charger on and CAREFULLY changed one battery at a time.
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Old 04-23-2012, 10:49 AM   #9
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There is an article in the May 2012 issue Diesel Power Magazine addressing this very issue. It's for a Powerstroke, but the fix is $500 and done with basic tools. Weak batteries wreak havoc on the electrical systems for diesels. Trust me I know. Me jumping starting old batteries cooked my alternator (batteries $200, tow $75, alternator $375).



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Old 04-23-2012, 11:38 AM   #10
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Both batteries in my Duramax were replaced under warranty about two weeks ago @ 35,600 miles. No damage other than new batteries. One started to fail last year and took until two weeks ago to fail bringing the second battery along.
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