Is the CL origional?, if so I'm assuming you cant physicaly lift the locking buttons on the front doors.
Each door has a motor in it with a switch system in the front doors.
When you lock a door the switch supplys power to all the motors, each motor then rotates untill it detects it is locked, if the motor never detects that it is locked it will work against the locking buttons holding them down, stopping you opening the door.
Firstoff remove the fuse, this should allow you to unock each door manualy.
These two circuit diagramms might help
http://www.pbase.com/tonytech/image/84733738
http://www.pbase.com/tonytech/image/84733738
You probably need to remove the door cards. and take out the actuators, strip them dow, clead them, replace the tiny springs, and reassemble.
Quite easy really.
T
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