How to Program the Keys on a 1999 Jaguar XJ8
- 1). Enter your car with your remote key device and leave open the driver's door behind you.
- 2). Hold the high-beam lever in the on position and insert your key into the ignition.
- 3). Turn the ignition to the "Acc" position while still holding the high-beam lever.
- 4). Release the high-beam lever and then pull and release the lever four more times.
- 5). Wait for a chime to sound and then press any button on your remote and release to program the remote to the system and end the process.
Source...