Front Window -- Left

CIRCUIT OPERATION
When the operator selects window DOWN operation, power is supplied on the F81 circuit through the switch to circuit Q11. Circuit Q11 connects the switch to the power window motor. Ground for the motor is supplied on the Q21 circuit back to the switch. A bus bar, internal to the switch, connects the Q21 circuit to the Z1 circuit.

For window UP operation the circuits are reversed. Circuit Q11 is the feed, and circuit Q21 is the ground.