I just fixed a leak in my 850's headlight washer hose this past weekend. To disconnect it altogether - I would suggest removing the plastic "T" fitting inside the engine compartment which should be right in front of the washer fluid fill spout along the inside of the right fender. This "T" connector splits the hose coming from the pump into two different hoses - one going to the windshield and the other going to the headlights. Replace it with a plastic elbow or straight connector that you should be able to get at the local hardware/auto parts store... take the T out ahead of time and take it with you for sizing - you shouldn't need any tools as it is simply a friction fitting. Good luck.