L322 Rear washer....

I've searched and searched and can't find my issue... the wiper works, the pump works but I'm not getting water. I have disconnected the pipe as it hits the motor and stop nothing, I've trided suction on the pipe and it creates a vacuum.
I can however hear what sounds like a splash in the roof.... I'm wondering if is 1 continuous pipe of there's a joint under the headlining... does anyone have any suggestions or a plan of where the pipes go?

Sorry cant help, I have the same issue and gave up in frustration I just know that when I press the button I am not getting any wet spots anywhere.

There appears to be two motors fed from the front washer bottle, not sure why there would be two for the rear washer.
if you can access the pipes at the front and disconnect them you could check the pipe(s) are clear and that the pumps are pumping i guess.

There will be a non return valve, that's perhaps knackered or failing that there may be a problem with the pipe at the valve
Its usually just a little in line thing, something like this

That's by the motor at the rear isn't it ?

Oh...I have this problem also...
Something to fix over Christmas...I keep forgetting...

IIrc there was a thread were the non working washers was down to the wiper arm spindle that the fluid goes though being blocked with rust, but I may be way of course.