Rear Wiper Motor help needed

[8vgti]

Advice needed please!! My rear wiper began to work intermittently in that it would wipe part of the rear screen and then stop. It has now stopped totally and wonder if the motor has died as I know it is a common fault. The relay still clicks in the fusebox so I presume it is ok and the wash jet still works. When you stand at the back of the car you can hear the motor click each time the relay clicks at the front but nothing happens.

Any ideas what it could be or is a new motor time  

[gtitdi]

check the wires in the rubber boot that runs in the hinge - sounds like a damaged earth or maybe another wire in there.