Liftgate/ running boards problem

Electronic's , aren't they great ? There is a control module (power lift gate module ) Switch (sensor) inputs to the module . Lift gate obstacle detection strip right and left , liftgate cinching motor ,liftgate unlatch motor .Liftgate drive motor assemblys left and right . Probably a bad switch feeding bad voltage signal to the control module ! Like one of the obstacle detection sensors maybe. Could possibly have DTC'S - diagnostic trouble codes stored in the control module. Your best bet maybe to have the dealer run diagnostic's on it , check for codes . Need a factory or professional type diagnostic tool to do this. I would say you mite be able to check the sensor inputs to the module , don't know what or how much voltage > Some of these circuit's are a five volt signal from the module . Ohm check the obstacle detection sensor ? I still think best thing would have it checked for DTC'S . Almost forgot about the thing opening when you close another door , All the modules on the vehicle are connected on what is call a serial data network . Doors have modules inside as well .could be commanding that door open some how.
If you would like to see what your up against , here is a web site for free wiring diagrams http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size. Under system click on body & accessories , then under subsystem click on power liftgate. Click the search button ,then the blue link. The second diagram down starts liftgate diagrams . Good luck !

This sounds like a BCM problem. This could have been affected by the radio hook up. But usually dealer hook ups are play and play after the radio is programmed to the vehicle. This is not something you should try to fix. You mess with the wrong thing and you could void your warranty and have to pay to have it fixed. I suggest you return it to the original dealer and have them repair it.

Has the recall been done to the liftgae ? If not see your local Ford dealer for an appointment.

there is a small plastic cover on the inside of the liftgate near the center. Pry it off with a small screwdriver and you'll have to probe around a bit with a larger flat screwdriver, but there's a small lever in there that will trip the latch. Is it a power liftgate by chance???
I have parts if needed...

check the ff.
1. check the liftgate button if its properly working by listening to a clacking sound if not then the solinoid is not functioning or check the liftgate hydraulic retainer (shock absorber like) if its pushing or not if not then the retainer lost its hydraulic pressure, bring your car to the dealer and check if its still under warranty... and get it replaced.

tascafordparts.com for discount.

The liftgate actuator and remote control are in the liftgate.
The module is in the left rear quarter trim panel.


SECTION 501-03: Body Closures 2003 Expedition/Navigator Workshop Manual
REMOVAL AND INSTALLATION Power Liftgate Module Removal and Installation
NOTE: Prior to removal of the power liftgate module, it is necessary to upload module configuration information to a diagnostic tool. This information needs to be downloaded into the new power liftgate module once installed. For additional information, refer to Section 418-01 .

1. Remove the rear quarter trim panel. For additional information, refer to Section 501-05 .

1. Remove the power liftgate module.
   1. Disconnect the electrical connectors.
   1. Remove the bolts.

1. NOTE: Once the new power liftgate module is installed, it is necessary to download the module configuration information from the diagnostic tool into the new power liftgate module. For additional information, refer to Section 418-01 .
   

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Principles of Operation
The power liftgate is controlled by the power liftgate module.
The power liftgate module receives inputs from:

• glass position switch (determines the ajar status of the liftgate glass).
• forkbolt switch (determines the primary position of the latch).
• detent switch (determines the secondary position of the latch).
• home switch (determines the power cinch status).
• power liftgate control switch (activates the power liftgate from the interior of vehicle).
• pinch strip switches (determines if an obstacle is detected between the pinch strip and liftgate).
• instrument cluster module (activates and sets the options for the power liftgate).
• optical sensor (determines the direction, travel speed and obstacle detection of the liftgate).
• UBP serial communication link.

The power liftgate module sends outputs to:

• liftgate motors.
• power cinching latch system.
• liftgate chime module.
• body security module

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The liftgate consists of the following components:

• liftgate window glass latch
• door lock actuator (power liftgate only)
• liftgate latch
• liftgate handle
• liftgate latch remote control (power liftgate only)
• liftgate ajar switch
• chime module (power liftgate only)
• -------------------------------------------------

i would go to a dealer and go in to the part department and they can give you a printout telling how it comes apart and if there is a good body shop or trim shop near you they can help you cause they have book and diagram and the salvage yard you got the liftgate from also have books too.

Fuse # 105- 40Amp Power liftgate module, Power
liftgate motors, Power running
boards control

Here is a link to your factory owners manual in PDF file format:

http://www.motorcraftservice.com/pubs/content/~WO3NAV/~MUS~LEN/41/03navog3e.pdf

the electronic power control module malfunction lamp. generally the problem is the brake light switch which is under warranty b/c of recall. check with your local dealer.

try reseting it by undoing the battery cable