Battery keeps dying

[Sxr212]

So got my truck back from the shop and had to replace one of the batteries cause it was bad and was dying. Then after it was replaced it ran great started great and didn't die for two days then go to start it this morning and nothing. Charged it up and drove it and it was charging. Got home and of the batteries was really hot. Neibor said it might be the alternator drawing amps so unplugged it and left it for a couple hours and the voltage had gone down and the battery was still very hot. Sorry for the long post. What do you guys think it might be our how to check for a short. Also ohmed the bAttery cables and it ohmed 0 so there is obviously a short.


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[OnTheBio]

When replacing one battery, both should be replaced.

I would take the 3 bolts off the alternator and take it to any parts store and request a test, or dealer.

I recommend going oem, rather than autoclone or o'cryleys.

Check the harness connections on alternator and clean and tighten any exposed battery cables.

[Sxr212]

Well I don't think it was the alternator cause I completely unplugged it and the batteries were still dyeing and the one battery was still getting hot. So there is defiantly a short somewhere. How do you check for shorts?


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[BigFuel]

Pull all the fuses under the hood. Battery cools off and you don't see a drop in charge?

-If no then the short is between the batteries and the fuse panel.

-If yes then hook a meter up tho the batteries and add one of the fuses back to the panel. No change? Add another fuse back and continue till you see the draw (normally if the draw is hard enough [especially since the battery is getting hot] when you put the fuse back in it will spark). When you see that draw from that fuse that will point you in the direction of what system is drawing power. Post back when you see what fuse is drawing power and we can direct further.

[Sxr212]

Ok thanks ill try that when i get off work.


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[Sxr212]

Well unplugged all the fuses and left it sit overnight and it drained both my batteries. So it's between the batteries and fuse panel. How hard is it to find where the short would be?


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[BigFuel]

Sorry, not a great pic. The big thing in the lower left is the Alternator: