One night my wife and I experienced a dead battery. After replacing the dead battery with a brand new one, problem over right? Wrong. The next morning the battery was dead again. After a series of tests we had our mechanic trace the problem to the dome light/ radio still drawing power after the vehicle was truned off. All the interior lights go out and the radio is not on, so how does this happen? The vehicle has not been in a collision so I dont think its grounded somewhere, plus the fuse is not blowing. But at the end of the day The dome light fuse is the only thing showing a draw on the battery..
Has anyone ever encountered this and what did you do to trace the problem to correct it. The vehicle runs fine now , but I have no iterior lights or radio..
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The battery light indicates that your alternator is NOT charging the battery. Your alternator is not working; it could be one or more of several reasons:
1. the brushes may be worn out in the alternator that supply power to the field windings. This is a fairly simple and inexpensive fix for a do it your self job, but automotive shops seldom if ever will do this.
2. Other things like diodes or an open winding could be wrong with the alternator; in which case you should just replace it [and while you are doing so, replace the serpentine belt]. See video enclosed
3. The battery could be bad because of the deep discharge it has experienced.
IT costs nothing to have a load test done on the battery to check for a dead cell which your problems point to. While the engine is running the alternator will be handling the power requirement but the battery will not supply the power required to start.
If you mean it is going dead while sitting you might have a short or another issue drawing power from the battery. take your truck to your local battery warehouse/store the should have a meter thet will tell you if something is drawing on your system. It could be something simple, like maybe the mercury switch on your under hood light is bad and the light is not turning off thus running your battery dead over night.
Classic question. Likely causes, check the DOME light switch in in the proper position. My wife had this problem for a week before she figured it out.
Make sure all of the lights are turning off after leaving the car. The car WILL use some power all the time. This can cause a dead battery on vehicles with older batteries. But, since you have already replaced the battery, we assume this is not the case.
I would go to the fuse panel and remove fuses one at a time an insert a current (ammeter) in series an look to find which circuit is using power. This can be a little difficult because you need to be sure the doors are shut, etc, so you don't have lights on. There will be a small draw on one or more circuits that power the keyless entry, etc. With a new battery, you are probably looking for something in the range of 0.5 amps or more. Anything less probably would not result in a dead battery overnight.
Oh, before doing any of this, verify your charging system is working properly...you should have 13.7 to 15.1 volts on the battery with the engine running.
this sound to me like at first I thought it was a fuse, as the problem went on it shifted more toward a weak cell in the battery, if a weak cell sits for a little while the battery will not hold the charge in that cell and that will cause loss of power, "its charge", in tne other cells. you had mentioned you used another battery and it ran great but when the battery was removed, things went wrong. You may check to see if there is water in your battery
It's probably the door light. This is a common problem and more can be found at TEAM SWIFT. You can disconnect the wire from the door jamb or turn the dome light to the off position. TEAM SWIFT has this common fix more in detail.