My front wipers do not park, they didn't park when I bought the vehicle years ago. I replaced the motor and column switch 3 years ago. I've just got round to trying to get them to park. The wire feeding the motor terminal 2 brown/light green has no power. If I run a power supply to terminal 2 it will blow 10/20/30amp fuses? Please can someone tell me if I have got it wrong? or is the motor duff?