Open the tailgate. On the doorclose pull down handle you will see a circular plastic cover either side of the handle. Remove these covers and you will find two screws - remove these screws.
Open the access covers either side of the inside of the door that give access to the fog lamp/reverse lamp bulb holders ( by the way on both my alhambra's there was only one fog light working but the vehicles were wired up to have both sides working - they only required a bulb to be fitted to the non operational unit ) if you look inside the covers you will see a Philips type screw on either side of vehicle - remove these screws. You should now find that the door panel becomes loose and you will need to flex the panel enough to remove the plastic fittings around the door cover. Then you will need to lift the panel slightly to release it from two clips at the window end of the panel. Be careful the panel is not heavy just awkward. Inside here you will find the rear wiper motor. If you just need to access the rear fog/reversing lamps you will only need to remove the small clip on panels either side of the inside of the door. Also if you are having electrical issues with the rear door electrics I would firstly look at the bundle of wires that go from the roof of the car into the rear door ( top left of open door I think) because the wires are so small they tend to break with the opening/closing of the rear door flexing them. let me know how you get on.
