wiper motor wiring

I'm installing an e-z wiring harness and I only seem to be having trouble figuring out my wiper motor and switch. I have a hot lead coming from the fuse block, 3 prongs on my switch, and 3 prongs on my wiper motor. The switch is grounded at the dash and I'm assuming one of the prongs on the motor is a ground. One I know is for the power washer (the middle prong). I keep blowing fuses no matter what I do! Does anyone know what I'm talking about? If so tell me because I don't. Please help! Thanks