Battery Discharge
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Battery Discharge
Hi all. If I let my truck sit overnight, by morning the batteries will be discharged enough for it not to start. I was just wondering what fuses in both the engine compartment and the cab, should be hot with the key in the off position cause I have a bunch of em on well after I turn the key off and remove it. Or what would cause such a big discharge in such a short amount of time? I know I need new battery cables, could that be the problem?
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Originally Posted by Cuda_jim
I think Rick nailed this one too, you guys in Mich are pretty smart 
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If previous test doesn't work try removing both positive terminals tie one out of way so not to touch anything ,take other terminal and put a voltmeteror test light between battery post & terminal if you get more than 3-4 volts or light is on you have a drain. Make sure everthing is off while doing this.If you find voltage or light start pulling fuses 1by1.When light goes out u have found the circuit that is causing you're drain,Good Luck..
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Originally Posted by fuelman
If previous test doesn't work try removing both positive terminals tie one out of way so not to touch anything ,take other terminal and put a voltmeteror test light between battery post & terminal if you get more than 3-4 volts or light is on you have a drain. Make sure everthing is off while doing this.If you find voltage or light start pulling fuses 1by1.When light goes out u have found the circuit that is causing you're drain,Good Luck..
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Well, form 10 am till now the batteries have gone from a little better than 12 volts down to about 9.8, so I guess Its time to start pulling fuses. Sidenote, I pulled both positive battery cables and placed a volt meter between the passenger side positive battery post and the passenger side positive cable and got a reading of almost the entire total battery voltage. Am I doing this right?
Last edited by DixieDirt; Aug 23, 2007 at 04:15 PM.