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.

A: I would look inside the car for an interior...

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!

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: My car doors keep unlocking and locking after I turn off the car and it drains my battery. What do I do?

Hi there. Check all of the door switches on the door jams. The driver door or passenger front door will cause the doors to unlock after locked if the switch is not working. This is like the driver door open...

Q: Car running fast after warmup.

Having your car run fast like this sounds like a frustrating experience. Let us get you pointed in the right direction so you can drive your car worry-free. The symptom you are experiencing with your vehicle sounds like something called...

Q: inconsistent ignition

If your engine is going up and down on the RPMs then you may have a leak in the intake air tube from the air cleaner to the throttle body. I would look for leaks in the plastic tubes between...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...