Bad Battery. Bad Alternator. Lights left on by mistake. Something left running. Exc.
A raidator in need of a flush will not cause a battery drain.
No, a bad rear sensor to an air suspension compression would not directly make a motor not work. It can cause a battery to drain which would cause starting issues.Ê
A short in the wiring.
Shorted diodes in the alternator.
dead cell in the battery or something is on pulling power from the battery.
Your alternator could be bad.
Any relay could be the cause.
If no light is on and no relay is stuck then the battery has a dead cell and needs replacing.
Could be a shorted wire, or bad battery.
I'd recommend you do a battery test and charging system test. The battery would be my first suspect.
Good possibility
Yes possible. If switch does not open on engine shut down battery will drain If switch does not close on start up battery will not charge