Could My Alternator Be Draining My Battery?
Even While Your Car Is Off, Your Battery Provides Power to Things Like the Clock, the Radio, and the Alarm System. .. . but When the Engine Is Off, the...
Even while your car is off, your battery provides power to things like the clock, the radio, and the alarm system. ... But when the engine is off, the alternator can't recharge the battery, allowing little electrical mishaps to drain your battery entirely.
How do you know if your alternator is draining your battery?
If the engine starts but dies immediately, your alternator probably isn't keeping your battery charged. If a jump starts and keeps your car running, but the car can't start again off of its own power, a dead battery is likely your answer.
Can an alternator cause battery drain?
Defective Alternator
If your alternator has a bad diode, your battery can drain. The bad alternator diode can cause the circuit to charge even when the engine is shut off, and you end up in the morning with a car that won't start.
Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.
