Rear Washer Woes

It could just be the connector, maybe try WD40 on it and maybe plug in the old motor to see if it does the same thing, then you can eliminate the cars wiring to be the fault.

 

Seeing as the fluid connector had come off in the boot, the screenwash had pooled inside the trim and may have upset something. I'll do that first as there was a LOT of it built up in there from the initial diagnostics.

I've forgotten, but as long as both these assemblies are identical it might be possible to swop just the wiper motor across to that new assembly - and so avoid taking the washer tube area apart and breaking something or have the seals leaking when it is all re-assembled.

 

Edit:- if you do chose to disassemble the shaft/tube area, make sure that you use maybe silicon grease on the outer of the washer tube, recover and re-use the best of the set of O-ring seals and transfer some grease on to the working area of the quadrant. Remove the spray nozzle first - it should pull out.

They're the same brand actually, although most likely a different vintage. I think first I'll plug the old one in. This will be really easy thinking about it as I can just uncouple the new motor without unbolting it, and just stand there with the old one plugged in.