I have a '96 XJS which turned out to have a drained battery. The keyfob didn't open the door so I opened the car using the key to try to start it. Of course it woudn't turn over. I then put the battery charger on. Once the car got sufficient charge, the alarm started. I then put the key in the ignition and it seemed to stop the alarm, but I didn't try to start the car yet, intending to give it a more substantial charge before starting the car. I then exited the car and used the key to manually lock it rather than using the keyfob. That is where things got heywire. The alarm started sounding off within about 1 - 2 minutes and the car door lock will not reopen using the key. I also tried the passenger side and it seems the doorlocks have both been put in lock-down. So now, I cannot open the car and the keyfob doesn't work to unlock the car or disable the alarm either. So now I have unplugged the battery charger until I can unlock my car and disengage the alarm. Can anyone help me out?