Question about 2003 Ford Expedition

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Current drain My battery goes dead after sitting for 4 days. Battery load tests good and charges up enough to start the truck after 15 mins. I can leave the charger on the battery for 4 days and it never drops below 5 amps charge rate indicating a constant current drain. I suspect the alarm system. Its a Code Alarm with remote start. I also have a trailer brake controller. I'm going to remove one fuse a a time to see if I can find a circuit that sparks when I remove the fuse. Does anyone know if this Ford has any electrical issues that may cause this problem? I'm a former auto mechanic with over 20 years of experience and have a strong electrical background.

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  • Tony Jun 23, 2009

    Tell me more about the 4x4 actuator.

  • Anonymous Mar 26, 2014

    This thing will drain a battery to 0 just sitting for a week. Battery load tests good.
    What could be leaking current?



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Check the light under the hood, the switch may be bad and the light stay's on all the time and over the visor. Check to make sure the vanity light is off also.  It's just a start and i have known also that the 4X4 actuator will drain too. Keep me posted, be glad to help and it sounds like it's going to be a gremlin to find the battery drain. 

Posted on Jun 23, 2009

  • Harvey N Tawatao
    Harvey N Tawatao Jun 23, 2009

    Was going though my CD and found that the wire harness to the electronic 4X4 actuator at the transfer case my get corroded casing a short to the relay casing a constant drain but if your 4X4 is working fine then that harness is ok. Common to happen to high road salt area or near the coast that promote corrosion. I did found a TSB though that os causing to drain the battery. Owners of 2003-07 Ford Expeditions and Lincoln Navigators may experience a dead battery along with a balky rear wiper. The problem is covered by TSB #07-10-13 and can be diagnosed with the following procedure: Pop the rear window open to make sure the wiper mechanism is disengaged from the motor drive plate. Next, open the beauty cover over the wiper arm attaching nut. Then, connect a dial torque wrench to the nut and rotate the wiper arm across the entire length of travel, keeping the blade touching the glass the entire time. Keep the window open during this test. The torque measurement must not exceed 49 INCH pounds. If you discover that it is greater than this amount, replace the rear window striker/wiper pivot shaft assembly. Corrosion on the wiper pivot shaft assembly causes excess torque and prevents the wiper arm from returning to the park position. The wiper system continues to attempt a park maneuver periodically and those continued attempts drain the battery. Hope this helps. Keep me posted, be glad to help.


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My 03 had the same problem, Rear wiper motor wont park . Wont move but is still on. My other issue was blinking light and radio turned off and on. Found short in wiring harness caused by overload from remote starter. Good luck

Posted on Sep 09, 2009


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