it was working up till about 1 week ago when I ran it out of water on a trip. filled back up but it doesn't seem to work any more. the headlight washers used to work when the lights were on every 5 to 10 window sprays. they fired 2 times. but now I have noticed they are no longer firing? the fuse is good. the reservoir is full and the window washers work. but I have yet to see the head light washers fire.