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Don
Don, ASE Certified Technician
Category: Car
Satisfied Customers: 1669
Experience:  30 years journeyman experience on classic cars
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Ford Expedition SUV: Why does my battery go dead after sitting

Customer Question

Why does my battery go dead after sitting over night?
BRAND NEW BATTERY
Submitted: 3 years ago.
Category: Car
Expert:  Don replied 3 years ago.
hi there my name is don
i will try to help you on this

if left fully charged it is completely dead by morning is that correct just want to verify your statement
don
Customer: replied 3 years ago.

YES

Expert:  Don replied 3 years ago.
Hi there thanks for answering that question
i am going to try ands diagnose your problem but it will probably be a few questions so maybe i can pin point it

have you double check to insure all your interior lights go off ?

do they stay on for a period of time once you exit the care ( some vehicles have this feature )?

lets start there
don
Customer: replied 3 years ago.

yes lites go off


yes stay on upon exiting

Expert:  Don replied 3 years ago.
how long do thay stay on for ?

does your headlights stay on as well ?

do you have a meter ?



Customer: replied 3 years ago.

1 they stay 1min


2head lites not on


3yes i have a metter

Expert:  Don replied 3 years ago.
hi there thanks for that information

i would take your meter and check the battery drain first check it with the auto shutoff on then with it manually shut off so nothing comes on when exiting the vehicle

you have what we call a parasite drain meaning that even though everything seems to be off something is still drawing power these are hard to find some times i will try to work with you till we find it
but first i would like you to disable the auto light shut off mode so that it is going off normally to see if it changes if not we will have to go deeper

you will not be charged for any info requests such as we are doing now

once the solution is found then i will press the answer button and a green button will show up asking you to pay

don
Customer: replied 3 years ago.

how do i disable auto lite shut off

Expert:  Don replied 3 years ago.
hi there
there should be a sawitch on the dash or attached to the light switch to put it into manual mode it will be in the owners manual

don
Customer: replied 3 years ago.

Ok, I will try this and let you know. I have a tester which I am going to use. I will get back to you after I try this. Thanks

Expert:  Don replied 3 years ago.
no problem just come back to this post or request me i will come back

i am thinking that the auto is not turniong everything off like map light dorr light or light in the rear
Customer: replied 3 years ago.

Don


I have checked all of the lights off


Turned off running board lights


took out fuse to cig lighter looked like bad socket


 


 

Expert:  Don replied 3 years ago.
hi there thanks for that great information

here is the instructions of how to find a parasite drain now

let me know what you find out and it could have been the cig lighter shorting out

don

http://www.wikihow.com/Find-a-Parasitic-Battery-Drain
Customer: replied 3 years ago.

seems like i need to buy a meter


i will contact you after i get one


thanks Rod

Expert:  Don replied 3 years ago.
hi there sounds great please let me know
\don

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