I had the same problem, my rear wiper started going bonkers on it's own, whilst my front ones stopped working. I looked in the handbook at fuses 20 + 24 as shown, but these were fine. Not knowing much about cars i called my brother who started talking about relays, linkage and motors, being out of work i was panicking about the cost. This was until i read this post which had the same symptoms as i was experiencing ( rear wipers working when you pulled the stalk back ), i instantly took your advice and checked fuse 33, 2nd from bottom right on the horizontal fuses, and found this to be blown. I changed the fuse and all works fine. Thank you so much, if it would not have been for this forum, then i am sure the local ford garage would have charged me silly money. Best site ever.