I am a proud owner of 91 300e and have a simple question about my washer jets.. well i get nothing when i need a simple spray to rid those pesty bug splats, or dried rain spots off my windshield. The jets themselves are clear of any clogs and all the hoses are attached plus the tank stays filled... however, i hear no noise when i attempt tp apply the spray. Is there a motor that needs to be replaced or cleaned?? my wipers work fine... what else am i looking for? thanks...