Dome light does not come on when doors open, but does when dim switch is rotated. The dome light bypass button has no effect on it.

These cars are known for this problem, and what I'd do is find a Ford Dealership mechanic's forum and ask there. You could also try calling the dealership part's department, and ask them. I'd bypass the dimmer, which eliminates all costs.

There is a short between the dome light and the door switches, this can be caused by something as simple as water damage. check all the wires and switches before you think it is the BCM.

all the lights above the dash do not work ?????? DOME light's ??? No light's come on when you open the door or any door ? Wouldn't think all the door ajar switches bad at one time .
Interior Lamps
The interior lamps consists of two groups, lamps that can not be dimmed and lamps that can be dimmed. This first group consists of lamps that may not be dimmed. This Includes those lamps that may be manually turned on by placing the interior lamp switch to the DOME position, or by opening a door or a compartment:
• Auxiliary dome lamp (SEO, RPO 6C7)
• Dome lamp
• instrument panel (I/P) compartment lamp
• Inside rear view mirror lamps
• I/P courtesy lamps
• Reading lamps
• Rear compartment courtesy lamp
• Sunshade vanity mirror lamps
Battery positive voltage is applied at all times to the DIC/RKE fuse and to the switched side of the BATT RUNDOWN PROTECTION relay in the right I/P junction block. The DIC/RKE fuse supplies battery positive voltage to the coil side of the BATT RUNDOWN PROTECTION relay. When the ignition is turned to the ON position, the body control module (BCM) provides a ground to the Inadvertent relay control circuit. This energizes the BATT RUNDOWN PROTECTION relay and applies battery positive voltage to I/P BRP fuse and to the TRK/ROOF/BRP fuse. Battery positive voltage is applied from the I/P BRP fuse to the I/P courtesy lamps, I/P compartment lamp and to the I/P compartment feed circuit to the BCM. Battery positive voltage is also applied from the TRK/ROOF/BRP fuse to the:

If the BCM receives a door lock or unlock input signal, the BCM will activate the BATT RUNDOWN PROTECTION relay, which provides battery positive voltage to all interior courtesy lamps. When any door is opened, the door jam switch contacts close and the BCM receives a door-open input signal. The BCM then applies a ground to the theater dimming ground control circuit illuminating the courtesy and dome lamps.
After all the doors are closed, the courtesy lamps remain illuminated for approximately 40 seconds. The courtesy lamps will also turn on and remain illuminated for approximately 15 seconds after the ignition key is removed, prior to any door being opened.
When the headlamp switch is placed in the DOME position, the BCM receives a ground signal. The BCM then applies a ground to the theater dimming ground control circuit. This illuminates the dome and roof rail lamps.
The courtesy lamps will normally turn off using the theater dimming feature. The BCM provides a pulse width modulated ground to all courtesy/reading, dome, and inside rear view mirror lamps for the theater dimming feature. The BCM will immediately turn off the courtesy lamps if a door lock command is received with all the doors closed, or if the ignition switch is turned to either the ON or RUN position.
The BCM activates the interior lighting output 15 seconds after receiving the class 2 message "Airbags Deployed" from the sensing and diagnostic module (SDM). The interior lamps remain activated for 25 minutes.

The door ajar switch is part of the lock actuator inside the door !

The headlight switch will either have a rotory knob that dims and brightens the instrument lights. When the instruments lights are at their brightest, just past that the dome light will come on. Back that off just a bit (you should feel it click). If it has no rotary knob then its in the pull switch that turns the headlights on. Twist that knob counter clockwise.

If that is not the issue then there may be a door jamb switch that needs adjusting.
Open a door and push on the door jamb switch (usually located near the front of the door area by the hinges). If it still does not go off then try another door until you find the one that makes it go off.
Then, with some pliers, grab the button and gently pull out. The button is inside of a sleeve and that sleeve moves in and out of the part that screws into the body. When you close the door it will push the button and sleeve in as far as it needs to go.

then if that is not it there is a wire for the dome light grounding. The interior lights have constant power and it is the ground that opens and closes to turn the light on and off.

make sure the dome override switch is depressed. The switch is located just above the rotating knob which dims the interior ligthts. The dome overide switch is located just to left of the steering column.

if the sunroof makes no attempt to open, and the dome light does not dim when you press the switch, chances are the switch is defective. If the motor is bad, or the roof jammed you should see the dome light dim and blink when you attempt to open it.

your door close switch is non-functional. its located in the door jamb. its a black button the size of a shirt button. usually held in by one or two screws.

there is one for each door.

sounds like one of the door ajar switches is stuck. buy a can of PB BLASTER at your local parts store and open each door and spray the door latch assembleys really good then close and open each door 10 to 15 times this will usually free up the stuck switch also make sure the switch that turns the dome lamp on is off . its the switch that dims and brightens the lights in the speedometer area. its located beside the headlamp switch