It may have an internal short or a leak where it lost all water. You may also have a short 8n the vehicle that is draining the battery. Make sure all lights are off when car is off. I had a bad brake light switch that caused my brake lights to stay on and that drained my battery overnight. I didn't notice it when parking during the day.
SOURCE: 1998 Ford Explorer
had same problem when my rear wiper motor went out. I had to locate all the rear wiper motor fuses and take them out to stop it. Am now waiting to replace my wiper motor.
SOURCE: I suspect a weak battery, but how do I know it's not a bad ALT?
when your car is running disconnect the positive cord from the battery. if the car stays on, than it is your alternator, if not its your battery. also if the car stays on, the head lights go dim if the alternator is malfunctioning
SOURCE: battery goes dead when car sits 3-5 days 98 park ave
Obvious that something is drawing down the battery...Put a test light between the negative cable and the negative post of the battery (remove cable first) start pulling fuses till light goes out. That will tell you what system is drawing...you can then begin looking for the actual problem. If all fuses pulled and light remains on ,chances are you have an internal alternator problem.
SOURCE: blown fuse 2007 lexus es 350
LOOK FOR THE FUSE BOX IT WILL SAY [ CL ]for CIG LIGHTER FUSE MITE BE A 30 JUST LOOK FOR THE FUSE BOX OR SEE LEXUS DEALER IT AN 2007 MAYBE 35DOLLARS OR LOOK YOURSELF
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