I have a 2004 Ford expedition and I just put in a new battery and a new alternator and my battery still dies overnight what could it be
Check all of you inside lights, map, overhead, etc. one may be staying on and draining the battery. If you don't find any doing that , then take the battery terminal loose and use a VOM to watch for a voltage rise/fall as you have someone pull fuses, one at a time, and put them back in. Something is drawing current
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