windshield wiper problem

might need a wiper motor or could have loose bolts or somthing with the wiper arms broken by motor

I had the same problem except that the intermittent would work properly occasionally. I disconnected the motor connector plug and inspected the motor pins. A corrosion had built up (a chalky appearance) on the pins. I cleaned the pins using a burnishing card and the wiper intermittent is now working properly.