I think I may have posted this before but anyway:

When i push the rear wash wipe on the stalk, I can hear the motor running but it sounds intermittent. No fliud comes out either. Is the motor kaput or the rear nozzle blocked or both?

might be as simple as blockage in motor or nozzle

remove the nozzle and operate if water comes from pipe
than have your answer

(need to remove rear spoiler to get access 3x1o bolt)

Best to start with the easy ones.

Is there water going anywhere else ? If you operate the washer and open the top tailgate do you see water running down the side channels?

Any brown water? This would indicate the seals in the washer motor have gone (Like mine did, it's in the Wiki)

If you remove the top spoiler, you can remove the wiper arm and nozzles and blow them out with an air line (I took mine off yesterday as the wiper arm cap wasn't seated correctly and was spewing water just down the screen, all wrong)

There is a very cheap fix for a knackered seal (NKSC did it and has spare washers) otherwise it may be a new motor required, from a main dealer its about £140

http://www.fullfatrr.com/forum/topic884.html

http://www.fullfatrr.com/forum/topic9924.html

http://www.fullfatrr.com/wiki/Accessing_the_rear_wiper_assembly Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top

*Gone:L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

The washer motor only works on one stroke of the blade hence the intermittent pump sounds The rest is answered above