Q: Something draining battery maybe radio

asked by on

Bought car yesterday they jumped it to start it and they assured nothing was wrong with the car it just had been sitting for a couple days. I noticed when I turned the car off and took key out of ignition and opened and closed my doors my radio was still on.i turned the radio off by pusing the power button and no lights were on the display screen.not thinking anything about it the car was not starting the next morning.the battery is completly drained.the radio does not look like it was just put it.

My car has 170000 miles.
My car has an automatic transmission.

The diagnostic would begin with the battery. The battery should be fully charged and then load tested. If the battery passes a load test and charging system output has been measured, too, 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 used) or if there are parasitic (excess) loads on any of the car’s electrical circuits. If there is excess current flow that is slowly draining the battery, a Mechanic would use an ammeter to test all of the various circuits until the faulty circuit is found. Then that circuit is traced to find the fault and repair it. If you want these steps performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request an electrical diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Something draining battery maybe radio

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: I got a message stating "Starting disabled theft problem" and the car will not start.

Hi there, thanks for writing in about your 2011 BMW 335 xDrive. It could be a low voltage situation with the battery. It can also be the key itself or the ignition switch. If you have access to a volt...

Q: The door ajar light won't turn off

Hello. On most vehicles, this is caused by the door switch in the latch assembly failing, or by the wiring from the door jamb wearing and breaking from years of use. All of the door panels will need to be...

Q: Catalytic converter going bad. Can I prolong its life?

Unfortunately, there is not much that can be done to prolong the life of the catalytic converter as they are very expensive to manufacture, thus the high cost of replacement. In order for the converter to work effectively, there are...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.