My 1997 windshield wiper motor works but when put on pause will keep running and then stop where ever it wants. After awhile it works like it is supposed to. What can cause this?

My 1997 windshield wiper motor works but when put on pause will keep running and then stop where ever it wants. After awhile it works like it is supposed to. What can cause this?
sounds like the printed circuit board is causing the problem. on some wiper motors you can purchase the circuit board separate from your local auto parts store. and replace it without removing the wiper motor from the vehicle.i hope this helps you out.