2000 Disco with lock problem. The driver's door will lock and engage the alarm with the key...driver door only. The other doors do not lock nor can I lock/unlock with the dash switch. My key is toast...doesn't work. I want to lock/unlock with the driver's key and the dash switch. I changed the actuator on the driver's door...no change. It sounds as though the actuators are 'trying' to work...they make a sound but don't work. Any suggestions.

 

What happens if you use the key and unlock your drivers door 2 times, will the other doors unlock?
Try locking and unlocking the drivers door 3 times to reset the syytem and see if that helps.

 

I guess it's the lock actuators. I changed the driver's door actuator and it works: locking and unlocking its self, setting the alarm and is locked/unlocked by the dash switch. Frustrating and a little difficult to believe all the lock actuators are bad at the same time (bought it used). Easier to buy/replace lock actuators (~$60 apiece) and do it myself than have the dealer do it ($1800 estimate). I'll let you know if it works. Key fob doesn't work, once the lock actuators have been replaced and 'work' I'll go to the dealer to get/sync a new key. Thank you.