Skip the auto shop - Our mechanics make house calls

Q: Something is draining the battery.

asked by on

Something is draining my car battery when the car is off.

I would look inside the car for an interior light that is coming on first. Usually a glove box light or a trunk light that is staying on when the car is off. If it’s not a light then a technician can come perform a parasitic drain test on the car where they connect an amp meter to the battery and remove fuses until the drain stops. Sometimes wires going to the trunk or doors can short out causing a drain.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Something is draining the battery.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: New battery drained of power in one week

If the battery is new and charging system output has been measured and is within specifications, the only reason a battery will discharge is if the car sits for a long period of time (batteries will self-discharge even if not...

Q: Car electronics went out

The first thing I would check is the fuses. Usually when interior electronics are not working, it's because the fuse for that circuit, or set circuits has blown. If the fuses appear to be okay, I would then proceed to...

Q: Audi A3 won't start

Hi and thanks for contacting YourMechanic. The battery has lost all of the amperage that the battery can hold. I recommend replacing the battery with a new battery and retesting your vehicle. If a battery voltage is too low or...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.