Q: Something is draining my battery, both battery and alternator have been checked and are working fine.

asked by on

I am having to jumpstart my vehicle. Once it is jumpstart, it runs fine with no issues but if I leave the car sitting for about 7 hours or longer I have to jumpstart it again. The battery and alternator both have been checked and are working fine. It appears that something is draining the battery after the vehicle sits for a while. I thinking a short in maybe the battery cables or a ground problem.

My car has 10900 miles.
My car has an automatic transmission.

Hi. Your diagnosis is spot on! If the alternator and battery are good, something is causing a pretty significant drain on the battery, and this needs to be identified. This problem can be diagnosed by connecting an ammeter to the positive (red) battery cable, observe the current drain (likely less than 1 amp), then, one at a time, remove each fuse, check to see if the current drain has dropped to near 0, then reinsert the fuse. This process should identify the faulty circuit in most cases. A professional mechanic, like one from YourMechanic, can perform and electrical inspection for you, and replace/repair the failing component as needed.

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 is draining my battery, both battery and alternator have been checked and are working fine.

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 cadillac cts has been jerk when I start to slow down it has been idling real hi and it almost feels like it is sla

This kind of reaction is often a sign of low transmission fluid or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer...

Q: Where is the fuse for the water temperature gauge?

There isn't one per se. There will be a fused wire with voltage to the instrument cluster (your owners manual should indicate which fuse), but the temperature sensor is providing a variable "resistance to ground," which the temperature gauge in...

Q: Will a new oil pump stop the possible valve ticking in my 2004 Subaru Impreza when its cold and what should I put in the transmission

Hello. If the oil pressure is low then a new oil pump can lessen or eliminate the ticking noise. If the oil pressure is fine and you are still getting noise then you may have a failure in the valve...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.