Ok is it that your windscreen wipers dont work or is it the windscreen washer pump thats not working.
When i bought my JTD the windscreen washers where not squirting water, neither was the jets blocked and the motor made no noise.
I assumed faulty pump, but then took the contacts off, cleaned them and made the connection tight, the pump has never skipped a beat.
If your windscreen wipers aren't working then you need a motor. I have a front windscreen motor, but not sure what its worth.
Joske