Strange rear wiper problem

[mossy810]

Evening,

A few weeks ago I picked up a second hand 306 HDI (90) 2001 306 Estate. When I tried the rear wiper the washer spray didn't work, could hear the motor spinning but no water. I then disconnected the hose from the rear motor nozzle and pulled down a section of the head liner at the rear, there was a pipe connected joiner that was blocked and managed to sort this.

All fine so far, water now spraying freely from the removed pipe no problems now. When I plugged the pipe back onto the 90 degree elbow nozzle on the motor, water was spraying out of the bottom of the elbow nozzle.

Is there supposed to be a cap on the end of it? Has anyone seen this issue before? Will upload a photo shortly.

Thanks in advance.

Pete