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.

A: You may have an A/C blower that intermitten...

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: Various problems with driver's side of car.

Looking at the wiring diagrams there is no correlation or common issue that tie together the AC, wipers, and speaker issues. For the heat issue where the drivers heat is staying there is either an issue with the front mode...

Q: Rotors scored pads good

Assuming scored rotors means there are likely "hot spots" or high and low spots in the rotors, this will cause brake pads to wear unevenly and to wear out prematurely. Depending on the severity of the rotors, it may be...

Q: Headlights automatically turn on by themselves at night when the car is off

Hello, thank you for writing in. The vehicle may be having issues with the headlight circuitry. This may mean that the sensor, photocell, body control module, replacement headlight, or a fuse/relay has failed. Something is allowing power to be sent...

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...
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.