My Ford Expedition Eddie Bower 4wd drains my battery every day once its jumped off its fine all day, Battery,Alternator, Starter are all good any ideas what may be wrong with it

Asked by Guru51D9W Jan 19, 2018 at 02:03 PM about the 2005 Ford Expedition Eddie Bauer 4WD

Question type: Maintenance & Repair

1 Answer

101,515

It's a parasitic drain on the battery, and can come from any number of electronic components. Google how to tackle a parasitic drain, or watch some Youtube vids. Most methods will involve a meter set to amps, you'll have to monitor the current draw on the battery with the vehicle off and see if it is a specific range. If it is excessive, then you'll have to start eliminating systems by pulling fuses or relays until the draw drops back into it's acceptable range. One catch is that constantly opening a door will keep some computer modules in an active state, so either disable the door ajar switch (not easy it's buried inside the door), pull a fuse that governs the door ajar switch, or leave door closed for 10 minutes to allow computer to go back to sleep before measuring draw on battery (have someone stay inside vehicle with door shut and pull fuses in that case). It can take some time so have patience looking for the draw. Also visually inspect every part of the wire harness for shorts, abrasions, burned wiring, etc. Some components, like a rear wiper motor or controls, are subject to a lot of moisture and are prime suspects in a parasitic draw. Usually a draw that can kill a battery in hours or overnight is more than a simple bulb remaining on (that type of draw would take days before finally killing a battery). One that can do it overnight might be a small motor, or a stuck relay or module. I had one where it was a bad IAC motor (intake air control), part of the throttle body. Took forever to isolate. A final word though, before investing a lot of time checking minor components, eliminate the major one - get a thorough LOAD test on the battery, alternator, and starter. Test starter relay, plenty of guides online. A battery can pass some voltage tests even with a bad cell, so get it tested under load. Good luck.

1 people found this helpful.

Your Answer:

CarGurus Experts

  • #1
    Larry Sturgis
    Reputation
    5,240
  • #2
    T_S_T
    Reputation
    4,540
  • #3
    Gene Arnett
    Reputation
    2,710
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Tahoe
13 Great Deals out of 847 listings starting at $698
Used Chevrolet Suburban
10 Great Deals out of 546 listings starting at $10,950
Used Ford Explorer
71 Great Deals out of 2,016 listings starting at $3,333
Used Lincoln Navigator
3 Great Deals out of 302 listings starting at $18,909
Used GMC Yukon
18 Great Deals out of 956 listings starting at $5,998
Used Ford F-150
336 Great Deals out of 13,399 listings starting at $3,000
Used GMC Yukon XL
11 Great Deals out of 716 listings starting at $11,500
Used Toyota Sequoia
4 Great Deals out of 53 listings starting at $14,999
Used Cadillac Escalade
18 Great Deals out of 524 listings starting at $4,995
Used Toyota 4Runner
27 Great Deals out of 530 listings starting at $7,990
Used Nissan Armada
10 Great Deals out of 241 listings starting at $7,999
Used Chevrolet Silverado 1500
201 Great Deals out of 8,235 listings starting at $6,995
Used Ford F-250 Super Duty
29 Great Deals out of 782 listings starting at $4,290
Used Honda Pilot
41 Great Deals out of 810 listings starting at $737

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.