In a modern car there are a few things that are still "on" even when the ignition is off, there's a clock in there somewhere, you've probably got an alarm as well ASO. It isn't much, but enough to drain a battery if left long enough, particularly if the battery isn't 100% to begin with.
Dead cell in the battery or the ignition or lights were left on.
The battery itself can not, but, as with any battery, the contact of positive & negative contacts can cause a spark which may constitute an ignition source.
Yes, IF the ignition SWITCH was left ON. I suggest charging the battery, and then have it tested at Autozone both of which are free.
there are many things that can cause this problem. bad spark plugs / wires bad alternator ignition problems loose or corroded battery conection incorrect timing
Fuse, flasher, switch, bulbs, wires, ignition not on, dead battery,Fuse, flasher, switch, bulbs, wires, ignition not on, dead battery,
Headlights run off the battery not the ignition...
It can cause the ignition lock cylinder to not turn. If it turns then the key is not why it will not start. Look into the ignition switch, starter, battery, or connections.
This is not common. Check to make sure there is not too much voltage at the dist.
Your battery is dead or you need to check the ignition switch.
no, the voltage regulater is for charging not the ignition system, it can however drain the battery
Good possibility
On many cars, disconnecting the battery will not stop the engine because the alternator is providing power to the ignition system. If the ignition circuit is locked in the 'on' position, the only way to shut the engine off is to pull the wire going from the coil to the distributor cap, or to pull the spark plug wires. Do not attempt to disconnect the fuel line, as it may cause a fire.