Wiper Blades Wiper Blades?

Wiper blades? - wiper blades

Ok, I have a 97 Chevy Blazer if it helps. Most of the time my windshield wipers do not work. Otherwise, you can try the engine, listen in work, but the leaves do not move. Noise like a hum, if it helps at all well. No idea what could be the problem?