Skip the auto shop - Our mechanics make house calls

Q: My car won't start anymore because the battery is dead.

asked by on

My car would not start so I called AAA And they charged the battery and also told me that something is draining the battery but don't know what it is. No lights were on or nothing. My battery is extremely old and I know I need to replace it. Also I wonder if my trunk had something to do with it because my trunk will close but it won't lock so when I drive and I hit a bump my trunk flaps up and down . What could it be that's really draining my battery?

My car has 146000 miles.
My car has an automatic transmission.

A: Hello, yes, something is draining your batt...

Hello, yes, something is draining your battery, and even a new battery won't cure that. This problem can be diagnosed by connecting an ammeter to the positive (red) battery cable, observe the current drain, 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 YourMechanic, can perform this procedure for you, and identify, replace/repair the failing component on that circuit. I would recommend having the dying battery inspected completed by a mobile, professional mechanic, such as one from YourMechanic, to diagnose this problem, get an accurate assessment of damage and cost estimate for repairs.

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・Save up to 30%

Get a quote

What others are asking

Q: Its overheating my chevrolte..can you help

Hello. You are likely experiencing a cooling system failure. If the vehicle is overheating, then there is something that is stopping it from flowing through they engine and radiator. This may be due to the water pump failing to move...

Q: Audi doesn't start

Jump starting a car made after 1996 can be a very risky business. You can do a lot of expensive damage in the blink of an eye if you hook the cables up incorrectly.That being said, it's possible that the...

Q: My rotors keep going bad.

You're correct. You shouldn't be going through so many brakes within a year. There is definitely an issue here. I believe you may just want to do a brake system flush. This will eliminate the first thing I thought which...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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...
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...