SOURCE: 1999 Grand Marquis remote control - no buttons work
10 year old remotes go bad often, especially due to moisture retention.
Testimonial: "Thank you, yes both(2) remotes are bad. I found a testing machine at a local auto parts store, even with new batteries the remotes do not send signal."
SOURCE: no brake lights
Sounds like it has a bad brake lamp switch. It's possible that if you have a third brake lamp and that works, but the others don't, it is a bad multifunction switch. The brake switch is located on the brake pedal. The multifunction switch incorporates your turn signal/ hazard/ high beam lever mounted on the steering column. As confusing as this sounds, I hope this helps.
SOURCE: Car will not unlock.
To get inside the car .... Use the key in the lock cylinder, unlock the drivers door to get inside. You shouldn't have to reprogram the fob unless it or the keyless module was changed. There may be a blown fuse that supplies the keyless control module (check the owners manual for location). or wires that lead into the Drivers door may be damaged ... The keyless module is located inside the drivers door at the bottom behind the door panel ... do the unlock/lock and trunk release switches on the inside of the drivers door operate the locks and or trunk release? If so it is not the fuse ... and not the wires to it ... And it could be your BCM body control module, located in the dash board to right of your gas petal. Because the number entry keypad (code for that is on the inside of the right passenger trunk bracket arm) also doesn't work I assume it's not the key fobs themselves. Your 98 manual is correct for your car.
SOURCE: 2000 grand marquis cruise control not working
Have seen this problem before. You need to look under dash at brake pedal and find a blue switch with plunger contacting pedal, disconnect connector and jump with a peice of wire and drive to see if cruise works and if it does replace deactivation switch this should get you going.
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