Door Locks on 1990 Jaguar XJ6

Open the front drivers door, press the lock down, shut the door then open it with the key.

use wd-40 or liquid wrench and a tooth pick- use toothpick to hold the little metal flap in lock back and spray oil inside- locks weren't uses much as you have remote locks- lack of use can cause rust/lockup
key will start engine? if not- you might have gotten the wrong keys- or there might be a different one for the door locks from the ignition key

Yes, the cylinder on the drivers door as well.

By design, anything that is open or unlocked will close when you turn the key to lock the door....Not sure if its a problem?

Is the key you are using green? If so, it is the Valet Key and it will only lock the door - it will not work on the glove box or the trunk.

If the doors will open from the outside, but do not open from the inside - the child safety switches are probably activated. Open the rear doors (from the outside) and slide the small levers next to the doors locks (on the edge of the doors) upwards.

when you battery goes dead, the security system locks the car. When you charge the bathery, use the key to lock the door and hold until the alarm activates. open your door and you can now start your [email protected]

the key should open the door without any batt power central locking is batt , the key should open both front doors!!owered so it should not be a problem !

on the back ofthe door lock in the drivers door there is a micro switch on the lock which ops the central locking if this is naff the c/l wont work! hope this helps

If the locks are working whilst you are driving then more and likely it is the actual door lock assy that is bad. the solenoid go bad and can cause erratic operation. But unfortunately they are only available with the whole door lock/latch assy.
I would disconnect the drivers and see if the problem still exists.
JPTCAT