2006 lincoln nav brake shift interlock

Does it have floor shifter ? Shift interlock system .
Diagnostic Trouble Code (DTC) Chart
DTC Component Description Condition Symptom Action B2572 Brake Shift Interlock Brake Shift Interlock Output Circuit Failure The associated circuitry connected to the smart junction box (SJB) or fuse, or the SJB itself may have an issue causing a brake shift interlock concern. Brake shift interlock is inoperative or does not operate correctly. Go To Pinpoint Test A .
SYMPTOM CHART Condition Possible Sources Action

• Shift interlock system does not release/lock correctly

• Circuitry open/shorted
• Fuse(s)
• Stoplight switch

• Go To Pinpoint Test A .

• Shift interlock system does not release/lock correctly

• Shift lock actuator

• INSTALL a new selector lever assembly. REFER to Selector Lever in this section.

Do you have a scan tool ? Not a code reader .

Your vehicle has a safety system that won't let you take it out of park unless you have the brake pedal pressed ! Your brake switch could be shorted inside causing fuse to blow !
Shift Interlock System A brake/shifter interlock mechanism prevents shifting the transmission out of the PARK position unless the brake pedal (2455) is applied. The system consists of the following components:

• an actuator activated by the key interlock assembly and brake pedal pressed input.
• necessary wiring.

The system operates as follows:

• The actuator is energized when the ignition switch is turned to RUN, locking the transmission range selector lever in the PARK position. When the brake pedal is applied and the stoplight switch (13480) is activated, the shift lock actuator is deactivated.
• The transmission range selector lever can be moved out of the PARK position.

The ignition/shifter interlock cable (3F719) locks the transmission range selector lever in the PARK position when the ignition switch is in the LOCK position. It also requires the selector lever to be in the PARK position to turn the ignition switch to the LOCK position.

You have a problem with THE SHIFT INTERLOCK SYSTEM !


The floor shifter assembly:

• locks the transaxle range selector lever in the PARK position when the ignition switch is in the LOCK position.
  


• requires the transaxle range selector lever to be in the PARK position to turn the ignition switch to the LOCK position.

PINPOINT TEST A: THE SHIFT INTERLOCK SYSTEM DOES NOT RELEASE/LOCK CORRECTLY







A1 TEST THE BRAKE LIGHTS

• Apply the brake pedal and view the brake lights.
  


• Do the brake lights illuminate?

Yes

GO to A2 .



No

REFER to Section 417-01 .




A2 TEST SHIFT INTERLOCK ACTUATOR POWER CIRCUIT

• Disconnect: Floor Shifter Harness Connector C3245.
  


• Key in ON position.
  


• Measure the voltage between floor shifter harness connector C3245-1, vehicle harness side and ground, while applying the brake pedal.
  
  Is the voltage greater than 10 volts?

A3 TEST SHIFT INTERLOCK ACTUATOR GROUND CIRCUIT

• Key in OFF position.
  


• Measure the resistance between floor shifter harness connector C3245-4, vehicle harness side and ground.
  
  Is the resistance less than 5 ohms?

Yes

INSTALL a new selector lever. Refer to Selector Lever in this section.

No

REPAIR the circuit. TEST the system for normal operation.

Are you sure it is not the brake switch?

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Brake light switch , wiring etc... Do you know how to test automotive electrical circuit's using a wiring diagram an a DVOM -digital volt ohm meter ? Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. Year , make , model an engine size . Under system click on transmission / transaxle .Under subsystem click on shift interlock . Click the search button an then the blue link . Test the electrical circuits .
Shift Interlock System An ignition/shifter interlock mechanism is installed to prevent shifting the transaxle out of the PARK position unless the ignition switch is rotated to RUN and the brake pedal is applied. The floor shift interlock system consists of:

• an actuator assembly integral to the ignition/shifter interlock cable assembly.
• a bracket retaining the actuator.
• the necessary wiring.

The solenoid is energized when the ignition switch is turned to the RUN position, locking the transaxle range selector lever in the PARK position. When the brake pedal is applied and the stoplight switch (13480) is activated, the ignition/shifter interlock actuator is deactivated and the transaxle range selector lever can be moved out of the PARK position.

Symptom Chart-External Controls
Use Rotunda 73 Digital Multimeter 105-R0051 or equivalent to perform pinpoint tests.
Symptom Chart-External Controls Condition Possible Source Action

• Shift Interlock System Does Not Release or Lock Properly

• Circuitry open/shorted.
• Blown fuse.
• Damaged stoplight switch.
• Damaged ignition/shifter interlock cable.

• GO to Pinpoint Test A .

When parked on an incline, engage emergency brake FIRST, then shift into Park. Hope this helps! Works for my Buick.

Usually this is caused by the circuit board which is part of the bezel.Ford has a technical service bulletin out on this.Here is a copy of the TSB

TSB 06-2-3
FLOOR MOUNTED SHIFTER STUCK IN PARK

Publication Date: January 13, 2006

LINCOLN: 2005-2006 Navigator

ISSUE: Some 2005-2006 Navigators may exhibit the floor shifter stuck in Park due to an electrical system concern or by damage from liquid intrusion.
ACTION: Follow the latest online Workshop Manual diagnostics in section 307-05. If diagnostics lead to an inoperative brake shift interlock circuit board which may have been damaged due to liquid intrusion. The brake shift interlock circuit board is located on the bezel. Replace only the bezel assembly, current service parts contain all liquid diverter design changes. Do not replace the entire shifter assembly.

NOTE: DAMAGED CAUSED BY LIQUID INTRUSION IS NOT COVERED UNDER THE NEW VEHICLE LIMITED WARRANTY.

PART NUMBER PART NAME
6L7Z-7D443-A Floor Shift Bezel

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Usually this is caused by the circuit board which is part of the bezel.Ford has a technical service bulletin out on this.Here is a copy of the TSB

TSB 06-2-3
FLOOR MOUNTED SHIFTER STUCK IN PARK

Publication Date: January 13, 2006

LINCOLN: 2005-2006 Navigator

ISSUE: Some 2005-2006 Navigators may exhibit the floor shifter stuck in Park due to an electrical system concern or by damage from liquid intrusion.
ACTION: Follow the latest online Workshop Manual diagnostics in section 307-05. If diagnostics lead to an inoperative brake shift interlock circuit board which may have been damaged due to liquid intrusion. The brake shift interlock circuit board is located on the bezel. Replace only the bezel assembly, current service parts contain all liquid diverter design changes. Do not replace the entire shifter assembly.

NOTE: DAMAGED CAUSED BY LIQUID INTRUSION IS NOT COVERED UNDER THE NEW VEHICLE LIMITED WARRANTY.

PART NUMBER PART NAME
6L7Z-7D443-A Floor Shift Bezel

Hope this helps and just keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa.

Your vehicle is equiped with a Brake Shift Interlock which means if the brake is not pressed the shifter will not go out of park. That switch could be bad. You can bypass this shift by using the following procedure. I hope this helps and good luck.

sounds like brake shift interlock solenoid is bad. try doing this emergency bypass. Turn key to off position, no lights on cluster. step on brake, pull shifter out of park to neutral. start car & drive away without putting it in park. see owner manul for better description.