Shifter stuck in Park.
I have a great tip for testing why your Lincoln’s shifter is stuck in Park. If your vehicle is on and running, at the same time it is experiencing this stuck gear shifter, it is likely that the culprit is in fact a faulty brake light switch. A quick way to determine if this is your problem is to have someone stand behind the vehicle (while the car is running and with the parking brake on) and press the brake pedal. Have that person inform you if your brake lights come on while pushing down. If your brake lights do not come on, then there is a good chance the brake lights switch has failed and you can contact a mechanic for this brake light repair. If you do see brake lights turn on, it is likely that the gear shift selector or the PRNDL switch on the transmission has failed. With any of these results, you will want to be sure to have a certified mechanic confirm the cause of a stuck shifter and have it repaired correctly as soon as possible.