HOW TO REMOBILIZE AN IMMOBILIZED FORD FUSION 2007

Question

vehicle won't start after replacing engine harness to engine control module

Answer 1

That would not matter, the PATS (passive anti theft system) is wired in the instrument cluster, from the instrument cluster to the PCM. The ECM can store up to 4 keys. Try this

1. Insert a programmed ignition key (can be an IKT or a standard PATS key) into the ignition lock cylinder and turn the key from the OFF position to the ON position.
2. Leave the key in the ON position for 3 seconds , but not longer than 10 seconds .
3. Turn the key to the OFF position and remove the first key.
4. Within 10 seconds of turning the key to the OFF position, insert a second programmed ignition key (can be an IKT or a standard PATS key) into the ignition lock cylinder and turn the key from the OFF position to the ON position.
5. Leave the key in the ON position for 3 seconds , but not longer than 10 seconds .
6. Turn the key to the OFF position and remove the second key.
7. Within 20 seconds of turning the key to the OFF position, insert the unprogrammed ignition key (new PATS or IKT key) into the ignition lock cylinder and turn the key from the OFF position to the ON position. Leave the key in the ON position for a minimum of 6 seconds (this additional 3 second time frame allows for the RKE data transfer to take place, if programming an IKT key).
8. NOTE: The new key will now start the vehicle and will also operate the RKE functions, if there are 4 or fewer IKT keys programmed to the vehicle (if it is an IKT key).
9. Attempt to start the vehicle.