I installed a new ignition, key & tumbler. I then took the vehicle to the ford garage and tried to have them flash computer. It wouldn't flash, they said I needed a wireless control module and I have found that this item has bee discontinued. The vehicle does not start at all now.
Does this vehicle have a wireless control module & if so where is it located at? on 1998 Mercury Mystique
Just because the dealer sells the car doesn't mean the know how to work on it. Take it to a ford friendly independant repair shop. Explain your problem and see and listen to their suggestions.