Q: Q: the battery won't stay charged.

asked by on

my battery keeps going down, and won't stay charged more than a week. the local auto shop and Ford just want to sell me batteries. (4 already) there is a parasitic draw somewhere but I can't find it what is the best approach to locate this problem? The alternator was replaced but battery still went down Thx a mil
My car has an automatic transmission.

I would first verify that the vehicle has a drain above 200 milliamps by disconnecting the battery’s negative cable and putting an amp tester between the post and clamp.

The test should be done correctly by having the tester attached and touching the clamp to the post and when removing and getting the amp reading. If the test is done properly and everything is off, then there should not be more than the 200 milliamp draw.

If it is more than that, then I would start removing one fuse at a time in the engine fuse box until I isolate the draw to a certain circuit. Then I would trace the circuit to see what is drawing the battery. For example, you can try opening your trunk an checking the trunk light to see if it is hot as soon as you open the trunk. This indicates it was on when the trunk was closed.

If you would like help finding the parasitic draw, a certified technician from YourMechanic can come to your home or office to diagnose your car’s battery issue and make any needed repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: the battery won't stay charged.

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: my nissan altima slips ii and out of neutral gear when in traffic,what could be the cause? 1999 Nissan Altima

Hello - I think the primary pressure pump in your transmission may be weak, or there is a problem with the valve body of the transmission, which regulates operating fluid pressure to clutches and bands. These are the components in...

Q: Trouble starting after fueling up

It is possible that your fuel pump could be weak. When you fill your tank up with fuel it may cause the [fuel pump]https://www.yourmechanic.com/services/fuel-pump-replacement) to malfunction for a short period of time. I would reocmmend having your fuel pump and...

Q: Starting, only clicks

The first to do is to make sure the engine turns by putting a socket and breaker bar on the crankshaft pulley bolt and turning the motor. If the motor turns, then you know it is in the wiring. Follow...

Related articles

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...
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.
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.