Hi, my name is ***** ***** I will be happy to assist with this today. In some cases, I may need more info to assist better. I apologize for any delay.
I try to be here most weekdays and some weekends. If you respond and I do not respond back right away I will do so as soon as I can.
The rear screen washer hose can become disconnected leading to the washer nozzle itself or damaged. This will cause the fluid to leak with the rear screen washer switched on/activated and as well with it off as fluid build up in the hose will leak out. This was a common issue.
I have also seen the boot seal leak or door seals leak in some cases which will also cause water intrusion into the vehicle itself.
I recommend having the boot seal and door seals checked for any issues. If any issues are found they will need to be repaired or the seals replaced for the affected door or boot.
If these are all o.k. then the rear screen washer hose needs to be located and followed through the vehicle to locate any disconnects or breaks in it. If a disconnect or a break is found it can easily be repaired to resolve this issue with an adapter or reconnection.
These are the main causes for this issue here and these do have to be looked into further to locate which is the cause and then it can be repaired from there.
If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service, your 5-star rating is appreciated ( should be a link to click on here or above). You can rate at any time and we can continue to work on your question as this will not close out your question. I work on delivering the best answer and help here but in some cases, it can be difficult to do without seeing the vehicle.