Question about Ford Expedition

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I have an 04 expedition . dattery drains after sitting overnight. replaced alternator and battery. hooked up amp meter and pulled fuses but nothing seemed to drop amperage down. what else do i try???

Posted by Anonymous on


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The pcm has a power down time of 1hr - 3hrs after you turn off the ignition . take off positive cable from battery and connect with alligator clip . second turn amp meter to 10a dc and connect as well. wait for pcm to power down and then disconnect alligator clip and wait for power drop. if no drop then pull fuses. if nothing still then it will be a sub system . disconnect starter first then altenator. the rest will need to be done in a shop

Posted on Jan 03, 2011

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If you disconnect the positive terminal from the battery and do a continuity test between that cable and the Negative cable you are going to find continuity. You have a grounded Positive cable or wire somewhere. either the insulation has worn through or a wire has been damaged. If you have added an Alarm or Stereo amplifier check those first as they are the likely candidates.

Posted on Jan 03, 2011


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Hi Anonymous, perform the following tests:
1. Fill acid type batteries to proper levels.
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Please kindly let me know if the information provided was usefull for you or you need more info
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