Skip the auto shop - Our mechanics make house calls

Q: My trucks battery keeps dying immediately after I shut it off

asked by on

One morning my truck wouldn't start so we boosted it and drove it around for half an hour. The battery level went up and would go down if I put the a/c on. Then when I shut it off it won't start again. Also, for a while now when the truck is warm from running for a while if I shut it off it will not start unless I leave the key half turned for like 2 minutes
My car has an automatic transmission.

A: You may have more than one problem with you...

You may have more than one problem with your truck. The ignition lock cylinder on these trucks would break on the outside and can cause problems with being able to turn the key enough to start the vehicle. A replacement lock cylinder is very inexpensive for the part and makes a lot of difference. The next issue may have is the ignition switch on these trucks go bad and do not make electrical contact in some positions. This is a common problem and requires replacing the electrical part of the ignition switch and checking the actuator rod to see if the rod mechanism is broken in any way on the column near the mechanical ignition lock on the column. After all this is fixed then you can have the battery and charging system checked for problems like a bad battery or cable connections or a bad alternator or both. I recommend having a mechanic, like one from YourMechanic, diagnose your car’s starting issue. They will be able to come to your home or office to have this issue properly resolved.

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: Throttle position sensor - 1994 Ford F-150

Hello. The only thing to do is to verify that the TPS was installed in the correct position. Make sure you did not put the little blade on the throttle body behind instead of in front of the sensor blades....

Q: Grinding

If your clutch was recently replaced, you should take it back to the mechanic that replaced it. I do need to point out that replacing a clutch at 35,000 miles is very early. I am wondering what caused your clutch...

Q: I have a 2000 F-150 the makes a whistling sound when applying or releasing the brake pedal. It sounds like air being let out of a

The brake booster uses engine vacuum to provide power assist when you step on the brake pedal. A component within the booster, such as the valve, and/or the external check valve or vacuum lines is probably leaking. The leak of...

Related articles

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.