hotpoint tvm560 door switch help?

does any one know which way the wires go back on the door switch please
i have a brown wire which comes from the motor
a grey wire which comes from the start button and a white and pink wire which comes from the controller. also where s the cheapes place to get the switch please.
after i changed the belt and put it back together when i switch it on and press the button it starts to buzz then stops and nothing.............. help please........