My washers just quit on my 90 735il. Both the regular and high intensity solution at the same time. I get alittle spray from the left side but only a dribble from the right. Is there two pumps on for each system?? If so how could both go at the same time or is it something else? I have checked all the hoses and found no leaks to loose pressure, and don't want to start replacing pumps until i'm sure it is the pumps. Thanks.