Rear wiper problem

[sesterfield]

it's a little more involved than that as you have to rotate the little arm 180 degrees otherwise it will sweep down the paint on the boot not the rear screen

eh? unclip the plastic panel, unscrew the bolt (far left) lay wiper flat, align up the part you just unscrewed, (obviously you have to rotate it or it wont lign up) tighten with spanner, clip on plastic panel. it took me 5 minutes mate, if that

The way you described in your original post sounded like you were referring to just the arm and not the mechanism by the motor 

[rubjonny]

I had this, was the actual motor that was shafted