Had this happen on mine about 6 months ago..... Turned out to be a broken wire causing all power to the boot going
If you open the boot and pull back the rubber boot top left you'll see the wiring you need to check, right hand side is where the fluid pipes for the washer are located
Was just a case of tidying up the broken wire and making a good connection then wrap in electrical tape and check there is enough slack so it doesn't get stretched
Dave