Car won't start
Did you replace it with another one? How are you starting it? The key and ignition lock cylinder on the old column is programmed to your vehicle, If you just swapped a new column assembly over, the new key setup will need to programmed to the car.
Just dropped the column. Same column
check the connections and wiring. Did you disconnect the battery beforehand. If not, maybe you blew a fuse.
Looking for a Used Mustang in your area?
CarGurus has 1,187 nationwide Mustang listings starting at $3,500.
Search Ford Mustang Questions
Ford Mustang Experts