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On a 2004 Lincoln Navigator : Starting on ( page 244 ) of the Owner Guide it explains the Brake Shift Interlock and what to do if you cannot shift out of PARK ( you've already done that ) Check to see if the brake lights are working , or it is possible that the fuse for the Brake Shift Interlock has blown and is no good
It is inside the shifter assembly.
2006 lincoln navigator requires a 7mm hex to remove brake caliper
5A. Stop Lamp Switch, (Speed Control, Brake Shift Interlock, ABS, PCM Module Inputs), GEM Module, Autolock, Air Suspension Module.
brake switch located on the top of the brake pedal
According to the 2003 Lincoln Navigator Owner Guide : Yes , it has an automatic parking brake release
Shift interlock solenoid is not letting shift mechanism to release, possible brake switch failure, faulty solenoid, or wiring.
Possibly the brake light switch is bad. I had a recall on a Ford Taurus that spoke of this problem. The brake light switch releases a solenoid that holds the shifter in park.
It is a small solenoid that is accutated when the brake pedal is applied allowing shifter to move. This is located at the shifter and can be heard if all is quiet shifter in park and brakes applied.
On a 2003 Lincoln Navigator : A problem has been detected with the Anti-lock Brake System It could be a fuse , a sensor , or some other problem As long as the red " BRAKE " light is not on in your dash , you still have " normal " brakes
It is on the steering column, but those rarely go bad. In fact, I have never had to replace one. Almost always it is because you have no brake lights. Possibly a bad brake light switch.
On a 2003 Lincoln Navigator : Fuse # 29 is a 30 amp mini fuse for the trailer tow electric brake controller , trailer tow 7 wire connector ( electric brake )