Re: 08 Grand Marquis
Dont know if this is any use with the problem ,
" Your vehicle is equipped with a Brake Shift Interlock safety feature. This feature prevents the gearshift from being moved from the P (Park) position until the brake pedal is depressed. This feature is active when the ignition is in the ON position. If the gearshift lever CANNOT be moved from P (Park) with the brake pedal depressed:
1. Turn the engine off and remove the ignition
2. Apply parking brake.
3. Reinsert the ignition key and turn clockwise
to the first position (OFF).
4. Depress the brake pedal, move the gearshift
lever to N (Neutral) and start the engine.
If you need to shift out of P (Park) by using the alternate procedure described above, it is possible that a fuse has blown and that your brakelamps may also not be functional. Please refer to the chapter titled Servicing Your Grand Marquis in this Owner Guide for instructions on checking and replacing fuses.
Also it could be the actual “brake light switch” is not functioning or has come loose and is out of asjustment. Have some one stand behind the car to see if the brake lights come on, if not check the fuse and switch "