I took advice from the internet from marka356, what you have to do is open the glove box, swing it down and you’ll see the fuse box. Undo the two 7mm bolts and push the two white tangs in to release the fuse box from the metal casing. you then need to lower it down and turn it around. there on the fuse box is the lock fuse 20amp(hidden between the wires).best thing to do is fit a fuse and see if it blows. if no check all locks work. which ever one don’t you can bet its faulty. if the fuse does blow you can disconnect each door individually either at the motor or on the door opening plug. you will need a few fuses possibly until you isolate which motor is faulty. You may be lucky and all works and fuse don’t blow.
You will find it easier if you unscrew the glove box from the hinge this will give you more space to work then take the lining down from the footwell this then lets you drop the fuse panel down on the loom wire the fuse is then more accessable it is hidden in the wires It is easy with marka356 help it took me 20 mins
to sort out at the cost of 20p Thanks marka356 it has made my car fully functional once again
Tony Ritson, November 2009