I have an unusual problem with my Expedition. The interior lights only come on when the right rear door, lift gate are opened, or the keypad is used to unlock the door. Additionally the warning chime for headlights left on (this has caused a dead battery twice so far) or key in the ignition don't work along with the headlight flash when you lock and close the doors don't function. I'm considering contacting a priest because my vehicle is surly possessed. Has anyone ever experienced this phenomenon? I've been told it's probably a ground problem. Any ideas?

 

Don't know what year, but possibly a bad GEM module?

 

2001. I'll check into that. Thanks.

 

Known issues with the GEM modules on these . Check that first .

 

Agree with the GEM module as being the chief suspect of electrical randomness.
But why....on the f150's , so I can't see why it wouldn't transfer to the Expeditions too. The front windshield leaks, which lets water migrate and drips onto the GEM module.
It can also be just a poor ground or bad connection.
IS there any other strange electrical happenings? Wipers working when ever they want? etc

 

The only electrical problems are those that I described. With 113K on the vehicle, I have no other problems and I really love the Expedition. On any kind of trip my wife packs as though we were headed around the world. If she had been on the Donner Expedition, they wouldn't have had to eat each other.

 

There are no other electrical problems. Also, the windshield has been replaced twice (rocks) since 2002.

 

HMMMm....well considering that the front glass been done & presumably sealed well. I guess that then I focus on fuses and connections and grounds.
This wouldn't happen to have a sun/ moon roof?

 

No.

 

Just yesterday I had a truck in the shop .
Water in the floor .New windshield a few weeks before .
I have a sonic ear with an ultrasonic transmitter .Cool tool .
Windshield was leaking .New install .
Poor install .