I was finally able to attempt to have a go at finding out why the rear washer doesn't work... Managed to get the cover plate off, and remove the brake light... But only one of the screws holding the jet in place would come out. The other is well and truly rusted and trying to remove it started to round off the screw head. So for now it's all back together... and soaked in some WD40. How do you remove all the interior trim from the tailgate? I figure if I can't get the jet off right now, I may be able to disconnect some pipe work from behind and see if I can blow water through.. which would eliminate the jet as the problem. Some one said that there is a non return valve in the line... Where exactly is it as that's another point I can check if the trim will come off.