Either the rear wash pipe has become disconnected at the wash bottle, or the nozzle on the back screen is blocked - or the tube leading through the tailgate has split, which shows up as a drenching inside the boot or headlining.
John
April 2009
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.