MG Car Repair: Wiper motor, wiper assembly, wiper arms

Question
QUESTION: I have just completed re-wiring the wiper on my MGB. My problem now is to get the wiper arms to park automatically when the motor is switched off. Can you suggest how I should rewire the motor. There are three wires on the motor - RED, YELLOW & GREEN.

ANSWER: What year MGB?

---------- FOLLOW-UP ----------

QUESTION: 1970 (Negaive earth with alternator).

Answer
There are 5 wires from the car to the wiper assembly so I would guess you are inside the wiper trying to rewire the motor itself. I don't have a diagram of the internal wiring but probably do have several wiper motors. I will dig one out and look at the internal wiring but it may take me a little time as I don't know exactly where they are.
Howard