Battery Dies when sitting for several days

jboatright

I've had this issue for a while now but is seems to be getting worse the older the truck gets. I've had the battery, and alternator tested multiple times and they always receive passing grades. If the truck sits for a period of several days or more without being started, the battery is sometimes dead when I go to start it up and go somewhere. It is really frustrating because it seems to happen and very random times, when I least expect it. Sometimes I can go start my truck without any problems at all after a week or so. Sometimes it won't start if I leave it alone for only a day or two. Usually after I jump start the truck it will run fine and start for the next several weeks. I'm wondering if anyone else has this problem? Is it possible that there is a short somewhere causing the battery to drain sometimes? Also, there is sometimes a buzzing sound that comes from under the hood when it is warm outside with the engine off and the truck at rest... could they be related? Any help would be great... thanks..

stever

I wonder if it's a drain and not just a bad ground somewhere. Try checking the battery cables, including the "other" end at the firewall or wherever.