What does the windshield wiper arm do? The windshield wiper system is a variety of working parts all acting together to keep your windshield clear from dirt and debris. When the wiper motor receives a command from the windshield wiper modul? it passes through the linkage to the windshield wiper arms - the parts that hold the blades as they move back and forth across your windshield. How do you know you need your wiper arms replaced? The wiper blade doesnt make contact with the window when swiping One or both wipers do not move when activated Wipers make a chatter-type sound when in operation Wipers leave streaks when in operation How is the wiper arm replaced by a mobile mechanic? The windshield wipers are placed in their resting position The resting position is marked on the window by our mobile mechanic The old windshield wiper arms are removed and replaced with a new set Both wiper arms should be replaced at the same tim? and a new blade should be installed when changing wiper arms Wiper arms are aligned with the previously marked resting position and the small mark is removed by the mobile mechanic Œć Wiper system is tested by running the windshield wiper system How important is having your wiper arm replaced? Working windshield wipers are an integral part of having a safe vehicle. If your wiper arms are broken or not working correctl? it may result in an inability to keep dirt and debris from blocking your view while driving. Our recommendation is that whenever you notice your windshield wiper system is not working as expecte? you schedule a windshield wiper system inspection to find out exactly what the problem is to ensure proper visibility when driving.