How to Program a 1999 Ford Mustang Ignition Chip Key Transponder
Step by Step How to Programming Instructions:
If you have no working keys:
1. **Preferred Option:** Call a mobile Automotive Locksmith to come to your vehicle to originate a new key. The Locksmith will then have to connect a special computer to your vehicle to program the new key.
2. Tow your vehicle to a Dealership, and they will originate a new key. The Dealership will then have to connect a special computer to your vehicle to program the new key.
If you have one working key:
Yes, buy/rent a programmer, otherwise, here are your options:
1. Call or go to an Automotive Locksmith, and they will have to connect a special computer to your vehicle to program the second key.
2. Go to a Dealership, and they will have to connect a special computer to your vehicle to program the second key.
If you have two working keys:
Yes, once you have had the new key cut by a Locksmith, use the following instructions:
1. Insert an existing working key into the ignition cylinder.
2. Turn the ignition cylinder to ON (RUN) and back to OFF.
3. Remove the existing working key and, within five seconds, insert a second working key and turn it to ON (RUN), then back OFF.
4. Remove the second working key and insert the new key before ten seconds have elapsed and turn it to ON (RUN). Leave it on for one second and turn back to OFF.
5. The security light will light up for three seconds to indicate that the new key has been successfully programmed. If you have lost all keys for this vehicle, you will need to find a locksmith to come to your vehicle to originate a new ignition key.
