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In message <UPMAIL06.firstname.lastname@example.org> "PAT MARTIN" writes:
> Can anyone tell me what controls the window wipers for parking.
A track within the motor itself. Three wires - permanent power, permanent
chassis ground, intermittent power.
When the intermittent power comes on, the motor starts to move. Once it has
moved 5 degrees or so, a wiping contact reaches a copper segment connected to
permanent power, and the motor continues to move using this as a source of
power. It only stops when it drops back off the other end.
Committee Member, UK Audi [ur-]quattro Owners Club