parasitic battery drain.

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Eugene
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parasitic battery drain.

Postby Eugene » Sun Jan 29, 2017 9:33 pm

Had a parasitic battery drain on my 2003 Ford Expedition for several weeks. Would kill the battery in 2 days.

On and off, spend 4 days checking the battery condition, charging the battery, working on battery cable terminals, pulling fuses, and looking for the drain. Today had the bright idea of turning everything off. Found the mid seat heater fan set to on and a cellphone charger plugged in. Corrected those problems.

Amp drain dropped back to .01 amps.

Just indicating how slow I really am. Should have started with the easy stuff first.
I have an excuse. CRS.

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Re: parasitic battery drain.

Postby Stanton » Mon Jan 30, 2017 8:58 am

At least you found it.
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John *.?-!.* cub owner
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Re: parasitic battery drain.

Postby John *.?-!.* cub owner » Mon Jan 30, 2017 10:58 am

Eugene, have you noticed that as we get older we tend to overlook the obvious and easy things?
If you are not part of the solution,
you are part of the problem!!!

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Re: parasitic battery drain.

Postby Eugene » Mon Jan 30, 2017 11:21 am

That's only because things are more complicated now then when I was much younger. So, the obvious answer is complicated.

Back when I was younger the electrical wiring diagrams for my vehicles were printed on one page in the service manual. Later the wiring diagrams were printed on 2 or 3 pages. Electrical problems, easy to diagnose.

I looked up the wiring diagram for the Expedition on the internet. The diagram must be 20 or 30 pages long. Complicate is an under statement.

Thinking that if the vehicle's components couldn't be electronically controlled, they wern't factory installed.
I have an excuse. CRS.

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Re: parasitic battery drain.

Postby ScottyD'sdad » Mon Jan 30, 2017 5:43 pm

A number of years back, a co-worker had a battery drain issue, in his car. Day to day, it ran. Parked for the weekend, it wouldn't start, Monday. Mechanic changed the alternator, and battery with no change. My suggestion, "Louie, shut one of your kids in the trunk". He asked why, I told him, "If I'm right, you'll know why"! Little tab that touched the trunk light switch, had broken off, so the light didn't go out, when the trunk was shut! Cost him a battery and an alternator, that he didn't need.
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