Re: 2004 liberty bcm issues
Welcome to the garage.
Not familiar with the Liberty, but there is only one BCM and i doubt that the problem is there.
Which door is still locking ok? There is only 1 relay for locking all doors, but two relays for unlocking. You are sure that the problem is only during locking?
You could try a battery disconnect for 10 minutes, this could reset the BCM. (if the jeep still has the original radio, you probably will need the radio code to get it working again after re-connecting the battery).