Dead Batteries

[wag68]

This is my first time to post anything but have been a long time reader. I have a 2005 6.0, AFE cold air intake, MRBP 4" turbo back exhaust, and an egr delete. Just put on the block heater cord. Everything has been working great. It has been getting cold here, about 16 this morning. Went to start it this morning and after the glow plugs cycled it tryed to crank then batteries went dead. I put the charger on it, fed the animals and drank some coffee and tried it again and it started just fine. It ran all morning long. Got in it after lunch, it sat for about 1 hr., batteries were totally dead. The batteries are not that old. Is is the cold weather that is killing them?

[Goose350]

I would go get them tested.

[ianstew]

Originally Posted by Goose350

I would go get them tested.

x2

[Fandini]

Goose is right, also make sure your battery posts are CLEAN as well as the connections. After you do that you may want to try charging them again, then have them tested. I have a 2006 and I started having problems this Nov. when it got cold as well. I had the same response "they're not that old!" I had mine tested, one tested bad and one OK. Cleaned the post, checked the water level and added some distilled water. I then put the bad battery on a charger/maintainer/desulfator for 2 days. Went back and had the batteries tested again and both tested GOOD. Now, mine are ready to be replaced but if I keep the charger/maintainer/desulphator on it every weekend I think I can get at last 1 more year out of them. They seem to crank fine since I started this little regiment, but I can tell that they don't have the same reserve power they used to. If you travel out of town alot or thru bad areas of town you may be wise to just replace the old ones for the added safety. Just thought I would let you know what happened to me last month.

[wag68]

Thanks for the info. I have cleaned the posts and connections. Can you get the batteries tested at autozone, oreillys, etc. or do I have to test them some where else?

[ianstew]

Originally Posted by wag68

Thanks for the info. I have cleaned the posts and connections. Can you get the batteries tested at autozone, oreillys, etc. or do I have to test them some where else?

A/Z, O'reilly's, Advance, etc.

[Tony V]

Yeah they should be able to test them for ya

[wag68]

Thanks, I will get them tested tommorrow and let u know how it turns out!

[Fandini]

I had mine tested at several places, but Advance did something I've never seen before, they hooked up a small battery to the OBD II port to keep power on the computer. Supposed to safeguard the computer . I don't know what happens when you disconnect the battery to put in a new one but just thought I would pass that on for whoever is interested.

[MoyockPowerstroke]

Originally Posted by Fandini

I had mine tested at several places, but Advance did something I've never seen before, they hooked up a small battery to the OBD II port to keep power on the computer. Supposed to safeguard the computer . I don't know what happens when you disconnect the battery to put in a new one but just thought I would pass that on for whoever is interested.

I think the device they used that you're talking about maintains radio presets. There is a similar device you can but that works thru your cigarette lighter....although since you have (2) batteries that are connected in parallel....they really didn't need to do this, since they only replace one battery at a time.