Skip the auto shop - Our mechanics make house calls

Q: Truck keeps dying but battery is good

asked by on

Battery has been check and is good but something is still running in the truck that makes it go dead. Believe the voltage regulator is sticking in the alternator.

You may have an A/C blower that intermittently stays on due to the blower control module in the blower housing causing it to stay on. In order to verify the problem, the blower will stay on even after the ignition is shut off. This does not mean the alternator system is not the cause, but the blower is the most common problem. You may also have a fretting corrosion problem causing problems in the vehicle modules and connections, and the shorting of a module from the corrosion may cause the battery drain. Only once you identify what is staying on and killing the battery can the problem be identified and fixed. I would have the vehicle diagnosed by a certified technician to determine why the car is stalling.

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: The engine loses power after a longer drive

It is possible that your fuel pump would be getting weak. Often times if the fuel level is run low many times, this can cause the fuel pump to overheat. If the fuel pump overheats, this can cause it...

Q: Does my 2008 Cadillac CTS 3.6 have two timing chains.

Hello. To answer your question, yes, this engine has two timing chains. If you have a timing code coming up then you may simply need to have the oil changed or there may be a more serious issue. If you...

Q: How are transmission cooling lines disconnected on the radiator?

Hi there. The lines that attach to the radiator are either connected by a threaded pipe fitting or a compression type pipe fitting. The compression type fitting will need to be pushed in before removing the line. If you need...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...