Doing a RW on the KL and at first I had to get new gromets for the washer bottle which I got from pick-a-part and now the water isn't flowing to the rear window.

Any tips?

The motor is working I swapped the hoses so the motor sent water to the front to check it.

ive noticed every time ive had to remove the washer bottle i've had to "bleed" the system. in my case that was putting the pump within the bottle(lines atatched) vertical and spraying til a good stream comes out. maybe you need to do the same?

Best guess is a blockage, and most likely it's right at the washer head as it's the smallest part of the system. I've not worked on the rear washer pipes before but if you can get to the pipe at the tailgate, try blowing through it back to the bottle/pump end to check the pipe's ok. There should be some resistance and I would expect you'd be able to blow bubbles in the tank. If no resistance and no bubbles, there's probably a leak somewhere. I have no idea of the pipe's path from the front to the back... anything wet inside or drips under the car? If the pipe seems clear and you can get hold of an air compressor, with the pipe detached from the nozzle try blowing air through the nozzle in the reverse direction, ie. outside to inside, to remove any crap that might be blocked there.

Best guess is a blockage, and most likely it's right at the washer head as it's the smallest part of the system. I've not worked on the rear washer pipes before but if you can get to the pipe at the tailgate, try blowing through it back to the bottle/pump end to check the pipe's ok. There should be some resistance and I would expect you'd be able to blow bubbles in the tank. If no resistance and no bubbles, there's probably a leak somewhere. I have no idea of the pipe's path from the front to the back... anything wet inside or drips under the car? If the pipe seems clear and you can get hold of an air compressor, with the pipe detached from the nozzle try blowing air through the nozzle in the reverse direction, ie. outside to inside, to remove any crap that might be blocked there.

Took the hose off the squirter at the rear window and no joy, I think it may need some high pressure air or water blown through it.

Try stripping the plastic off a twist tie and poke the wire into the washer head you can get a bit further in and maybe break the blockage