Provide a failsafe if something draws too much current.
Car battery completely dead no lights.
It is not the battery or the alternator unless the white box in the trunk of the car that has a circuit board in it and many wires that lead into this box can fry the alternator or the battery while the car is off.
Now after few minutes have elapsed you should start the car with the flat battery.
Could be many things.
The vehicle won t start at all or will crank slowly.
With a seriously depleted battery the best thing to do either before or immediately after a jump start is to connect it to a dedicated battery charger.
If the battery is very weak the dome light may appear dim.
If the charging is done you should remove the jumper cables.
Fuses and fusible links.
Driving a car with a dead battery can also damage the alternator.
If your car battery keeps draining the first things to check are your lights.
There should be a sticker on it that tells the month and year it was made.
Check to see how old it is.
But if your car doesn t have this feature your headlights may stay on until you either turn them off or till your car battery is completely drained.
Five signs of a dead car battery no dome light when opening the door or no door chime with keys inserted.
As you may know the alternator charges the battery while the engine runs by generating amperage and recharging the battery while the engine turns the alternator pulley.
Provides power necessary to start the vehicle and powers accessories when the engine is off.
It sounds like you may have a weak battery a failing voltage regulator or failing alternator.
Lights will typically dim and the engine may die.
Check the fluid in it too and the.
Continue doing so for a few minutes.
Many newer vehicles have headlights designed to turn off after a certain amount of time.
If the battery is totally dead you won t hear a chime or see the dome light at all.
Start the car which has the good condition battery and the dead battery would start charging.
These charging devices are designed to feed electricity into a dead battery at the rate necessary to safely and deeply charge it without causing any damage.