Skip the auto shop - Our mechanics make house calls

Q: Battery being drained

asked by on

For some reason my car battery keeps getting drained , I have had my battery , alternator and starter checked and they are all fine but my car battery keeps dying and no one knows why !

Without knowing a make or model of the vehicle, it is impossible to narrow down the issue. Parasitic draws, or battery drain, doesn’t have to come from the starting system. The problem can be anything electrical on the vehicle.

Drains are usually traced down using a voltmeter or comparable tool. The usual systems to blame for these issues include alarm systems or anti-theft systems. You may not even be aware you have one on the vehicle until something goes wrong with it.

Radios, especially aftermarket ones, are also high on the list for having these issues and draining the battery. Have any electrical components been damaged or failed recently? These would be places to check as well. Another trick you may want to try is running a scan on the engine. If an electrical component is reading outside of its normal range, say from a short or something, it may show itself there. Have a professional mechanic, such as one from YourMechanic, perform an electrical inspection to see if this is the source of the problem.

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

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: Flashing dashboard lights

The xeon type head lights will tend to flash or go dim and bright when they are going bad. Replace both front headlight bulbs at the same time. They will fail close to each other and one will be dimmer...

Q: Car battery overheating

This is a safety hazard and should be addressed by a certified mechanic. Battery's hold down brackets often become loose and can get caught between the battery's posts causing a short. This can mean a wiring problem that can involve...

Q: Car Won't Start went

Hello, thanks for writing in about your Ford Explorer. You would know if the alternator was at fault if it died while you were driving it and then would not crank. I would suggest replacing the battery and then have...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.