What happens if you ignore a drained car battery?
If you have the drained battery, and you ignore it, the battery will drain to 0 % and dead. So most of the time you can not start the engine. Think about you are driving on the highway, and you have a dead battery. You will be in trouble since everything will be delayed and it affects other drivers too.
How to find the cause of parasitic battery drain?
Luckily, you can usually find the cause of a parasitic draw yourself. Start by connecting a digital multimeter to the negative battery terminal of your vehicle. Then, remove the fuses one at a time while watching for changes in the multimeter’s reading.
Why does my OnStar battery drain so much?
Community Answer In older vehicles running analog Onstar, the system will drain the battery because it is constantly looking for a signal. Onstar no longer offers an analog signal, only digital.
How to get rid of negative battery drain?
Remove the negative battery cable from the negative battery terminal. Find the negative cable, which will be marked with a minus sign (-) and may have a black cover over it. Remove the cover, if applicable, and use a wrench to unbolt the negative cable from the terminal.
If you have the drained battery, and you ignore it, the battery will drain to 0 % and dead. So most of the time you can not start the engine. Think about you are driving on the highway, and you have a dead battery. You will be in trouble since everything will be delayed and it affects other drivers too.
Community Answer In older vehicles running analog Onstar, the system will drain the battery because it is constantly looking for a signal. Onstar no longer offers an analog signal, only digital.
Luckily, you can usually find the cause of a parasitic draw yourself. Start by connecting a digital multimeter to the negative battery terminal of your vehicle. Then, remove the fuses one at a time while watching for changes in the multimeter’s reading.
How can I find out if my battery is draining?
Replace the fuse and disconnect each lamp, heater, or electrical device one at a time. Flip all of the switches that correspond to the components as well. Watch for the reading on the multimeter to drop to find out which component is causing the drain. For instance, say the offending fuse controls the power antenna as well as the radio.