02 f250 battery draining when sits a day or 2

Asked by drock121 Jun 26, 2019 at 10:10 AM about the 2002 Ford F-250 Super Duty XLT 4WD Extended Cab LB

Question type: Maintenance & Repair

I have a 02 f250 super duty. it does a rebuilt title so it has been wrecked at some point. The problem I am having is the battery will drain after it sits for a day or so. when I turn off the ignition the radio and windows will still work for 10 min or so. curtesy light sometimes works but flickers. door locks have never worked. I have pulled every fuse and draw is still there. pulled relay for ins. cluster and still a draw.  any ideas...

2 Answers
42,890

Hornet_2497 answered 4 years ago

With the battery fully charged, disconnect the power lead and see if the battery is dead (or drops a lot of volts) over night. If it dies while disconnected, the battery has an internal short. Then the problem is not the truck. It would be the battery. Check it out.

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drock121 answered 4 years ago

Checked and replaced all " easy" solutions. This has been a problem ever since i bought the truck. New battery, new alt. new starter, new cables. door ajar lights are always on on the dash, windows and radio work all the time no key needed. obviously wiring just hoping somebody has had same problems and had an answer. im thinking more along the lines of ECM or instrument cluster microprocessor.

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