Skip the auto shop - Our mechanics make house calls

Q: Battery wont stay charged

asked by on

1973 Ford Thunderbird there might be a slow draw with the battery when i have the connection hooked up the battery dies so i have to unplug the battery time i get out i have replaced the battery and alternator and it still dose the same thing then i tested the alternator when the car was on and it was reading 12.6 volts

My car has 141000 miles.
My car has an automatic transmission.

A: It appears the alternator is providing the ...

It appears the alternator is providing the correct charge (within range) to the battery at 12.6 volts. This also suggests that the voltage regulator is working properly. You may have a slight power draw coming from somewhere in the car. Try checking things like interior lights, stereo connections, trunk light, under hood light and anything else that may have a small bit of power coming from it that may otherwise get left on when leaving the car overnight. You may also have a grounding issue somewhere as well. If you need assistance, a certified YourMechanic technician can come to your location to perform a battery will not hold a charge inspection on your vehicle and help diagnose this issue.

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

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: How Does a Mechanic Check a Car Alternator's Voltage Output?

The first thing a mechanic will do is to check the battery cables to make sure they are clean. Then the battery is checked to make sure it is at the proper voltage of close to 12.6 volts, using a...

Q: Lost all power to the car

Turning on one additional switch creating a loss of all power suggests you have a short somewhere in your system. The additional power draw that the extra fan is creating puts an additional load on voltage being supplied to other...

Q: My battery lost power and I recharged it. Now, every time I hit my breaks all of my lights blink for one minute.

Hi. This sounds like the battery terminals are either loose or going bad creating a bad connection with the battery. There also could be corrosion on the terminals causing a bad connection with battery. The battery supports may not be...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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.